Why Are You Becoming a Villain Again?

Chapter 137: Side Story – A Silent Competition (9)

Keirsey was sitting beside me, feeding me food that was clearly prepared with intent.

Daisy, perhaps to avoid unnecessary conflict, had willingly yielded her seat to Keirsey.

At first, Keirsey waved her hands, saying that there was no need for that and she felt sorry, but in the end, she sat beside me, pretending to lose the seat-battle.

And as soon as Daisy left, Keirsey stretched one leg to the side, sat on my lap, and began feeding me bite after bite.

While I chewed, she rested her head on my chest.

“……”

Having eaten plenty of Keirsey’s cooking before, I can say this with certainty—this time, the food was especially good.

Though it was barely a recipe—just raw ingredients thrown together—it exploded with flavor in my mouth, as if proudly showing off the quality of the produce itself.

To me, it felt like a royal feast, a personal event orchestrated by Keirsey. And yet, when I considered the true intention behind it, a complicated feeling stirred within me.

“…Oppa, ah~”

“I think I can feed myself now—”

“Ah~”

Embarrassed to just sit there and be fed like a child, I tried to decline. But Keirsey insisted, determined to feed me with her own hands.

And well, I had promised to grant her wishes for five days. So, I gave in.

As I chewed the oyster she brought to my lips, more thoughts crowded my mind.

Just what exactly is Keirsey preparing for?

If she intends for us to have sex every day for five days, how is that supposed to work?

Won’t that be too much strain on her body? Was she planning something that intense from the start?

It was the first time I’d ever received an actual warning in advance and been fed stamina-enhancing food like this before intimacy.

My head spun with thoughts.

Neither the impulsive Judy nor the meticulous Asena had ever prepared me in such a deliberate way.

The one who always seemed the most innocent, Keirsey, was drawing the biggest picture of all.

“Ugh… Keirsey, I’m full now… Can I stop eating? You said this was meant for me and Daisy to share, right?”

“Ah.”

And yet, she showed no signs of relenting. If anything, her resolve had hardened. She pouted with frustration, clearly determined to see her goal through.

Only after I had finished every last bite did she finally rise from my lap.

Without a word, she cleaned everything up, then came back in front of me and gently cupped my cheeks.

I thought she was going to kiss me—just like always.

“…..?”

But instead, with a restless expression, she bit her lower lip twice and turned away.

It was as if she was desperately restraining her desire to kiss me.

“…I’ll go now, Oppa.”

“You’re just leaving?”

It was the first time she had left like this, so I asked. At my question, her shoulders twitched slightly, and her eyes fixed on my lips.

Breathing heavily, she shook her head and finally said,

“…Yeah. I’m holding back today. See you at dinner.”

And with that, she wheeled her cart out of the room.

My mind only grew more tangled.

That evening, it was the same again. Keirsey showed up with another round of stamina-boosting food. Daisy, who happened to be nearby and kept seeing those dishes, let out a faint but unsettling hum.

Feeling awkward under her gaze, I kept glancing at her face. Eventually, she sighed deeply and gave me a soft smile.

It felt like silent permission. Once again, her warmth and generosity calmed my heart. Daisy had always made me feel safe like that.

I forced myself to finish another mountain of food, and afterward, Daisy and I wrapped up our paperwork together. The marriage preparations were nearly done. Only a few documents remained.

After that, the rest would just involve running around, making appearances.

We both praised each other for the hard work and shared a moment of happiness. We sipped tea, exchanged idle chatter, and began winding down for the night.

After a soft kiss, Daisy and I parted ways. I showered and returned to the bedroom.

—Creak.

“Whew… Finally, all cl—”

—Thud.

Inside, Keirsey was already waiting.

“…Why did you take so long?”

Naked.

“……”

She was sitting on the bed with her legs tucked under her, a blanket loosely draped around her. Her flawless back was partly exposed to me.

Her arms were folded to hide her chest.

I could tell she was trying—putting in a lot of effort—but I could also sense her embarrassment.

It struck me again that Keirsey had grown into a woman. This wasn’t the little girl I used to know.

Never had the difference felt so real.

Was it starting today? The five days of physical union?

Why exactly five days? Would her body be okay?

A flood of thoughts rushed through my head. Maybe I felt this way because Keirsey was different. I had known her as a younger sister for such a long time—acted that way, thought that way.

“…Oppa.”

She slowly turned her stiff body toward me and called out.

Now fully facing me.

Still covering her chest with her arms, she cautiously adjusted the blanket… and then began to spread her arms apart.

Her bare upper body was gradually revealed.

With trembling hands, she tightly gripped the blanket, but she still opened her arms, showing every delicate part of her body to me.

If we were animals, there could be no clearer sign of submission. She revealed all her weaknesses to me.

Smooth underarms. Soft-looking arms. A toned stomach. Full breasts. Firm thighs and the lower abdomen above them.

It was the body of a sculpture come to life.

“…Oppa… huff… take off your clothes… and sleep with me.”

She spoke with her head bowed, voice trembling with shyness.

To keep Keirsey from staying embarrassed for too long, I began undressing, one layer at a time.

When I finally took off my pants and undergarments, Keirsey’s face flushed even deeper, and her eyes occasionally flickered toward me with shy curiosity.

I slowly approached her.

“…….”

Reaching out, I gently caressed her cheek. It was easy to see how nervous and bashful she was, so I wanted to help her feel at ease.

At some point, she had let go of the blanket. With cheeks flushed and eyes slightly teary, she looked up at me.

I hadn’t forgotten what this moment meant. This was about showing her that I loved her.

Because of that, I tried harder than usual to express my affection—hoping to soothe the parts of her that might still be hurting.

As I brushed her cheek, my hand moved under her chin, lifting her face toward mine.

I intended to start with a kiss.

“…Ah…”

But Keirsey suddenly pulled her head back.

“…Keirsey?”

I didn’t understand why, and it left a faint sting in my heart. In this moment, I felt strangely vulnerable too.

“Ah… No.”

She spoke, her voice wavering.

“Tonight… no kisses.”

Keirsey swallowed hard, then added in a near whisper,

“Tonight is a night we don’t do anything, Oppa. I… I want to, too, but… I have to hold back.”

Her words naturally raised questions in my mind, but I chose not to argue. I’d already promised I’d follow her lead and show her love in the way she asked.

“Then… what’s tonight for?”

She had clearly come to me with a purpose. If kissing was off the table, then surely everything else was too.

Still, I didn’t mind honoring her request. In fact, it gave me a bit of relief too.

Honestly, the thought of doing this with Keirsey for five straight days had me more concerned for her well-being than anything else.

“Tonight… is just a night to look at each other.”

Then she grabbed my wrist and gently led me to the bed. Her movements were shy, but firm.

Watching me climb onto the bed beside her, Keirsey lay down first, then patted the space beside her, inviting me to lie next to her.

Once I slipped under the warm covers, she snuggled close and pulled the blanket up over our heads.

Even then, she didn’t try to touch me like she usually did. Her restraint made it clear that she’d prepared herself seriously for this moment.

I chuckled softly and asked,

“So… we’re just supposed to look at each other?”

“…Yeah. And talk, if there’s anything we want to say…”

Following her lead, I slowly let my eyes travel across her form.

It wasn’t easy to see in the dim light, but I could be certain of one thing:

Though she had once stood before me unclothed, I’d never looked this closely.

This was the first time I truly noticed.

Though I’d guessed before, now it was undeniable—

Keirsey had a fuller chest than I expected.

“…Can I get a little praise?”

She looked nervous as she asked. I hadn’t said anything for a while, and maybe that silence made her uneasy.

“…Your chest is bigger than I thought, Keirsey.”

I mixed a little joke into the comment, hoping to lighten the mood.

She dipped her head and subtly drew her arms inward, trying to hide.

But the effect only emphasized what she was trying to conceal.

As time passed, the awkward tension between us slowly shifted into something gentler, more charged.

Keirsey’s shy gaze became more open, slowly sweeping across me.

She gulped audibly as if trying to etch every detail into memory.

Everywhere her eyes passed, I could feel my skin react.

With physical contact removed, my body became even more attuned to subtler sensations.

New feelings began to awaken—delicate, slow-burning ones that replaced the sharper pleasures of the past.

Her eyes grew mistier. Her cheeks reddened. A light sheen of sweat made her skin shimmer, and her natural scent drifted over stronger than before.

The girl I once thought of as young now carried the quiet allure of a grown woman.

‘Damn.’

I let out a small groan and closed my eyes, embarrassed.

My body was reacting—clearly and uncontrollably.

Even though I tried not to show it, Keirsey noticed.

She inhaled sharply at the sight.

She tried to keep a calm face, but it clearly wasn’t working. She kept swallowing, her body fidgeting, her breathing growing uneven.

This moment wasn’t easy for either of us.

It was a test of patience.

Just spending this long staring at one another had brought our bodies to the edge.

But she said tonight wasn’t the night.

So we endured.

Even without doing anything physical, it felt like we had shared something deep.

Like we had gotten even closer.

I could now clearly understand the contours of her body—and, in doing so, realized just how captivating she truly was.

Her clothes had hidden all that until now.

“…I’m not allowed to touch you?”

I asked, my voice low, watching as Keirsey bit her finger and blushed furiously. She flinched at the question.

“…Huh…?”

“We’re really just going to lie here and look?”

Through that question, I let her know what I was feeling.

That I wanted to touch her.

Her soft pink tips twitched slightly, reacting to the question. It was clear she was just as affected as I was.

“………”

Keirsey bit her lip and finger, debating internally. She stared at my body for a long moment before locking eyes with me.

After struggling internally for quite some time, Keirsey finally shut her eyes tightly and spoke.

“…No… we can’t.”

“…..”

“Not tonight… Oppa.”

“…Okay. So, tonight we just look at each other and fall asleep?”

“…Yeah.”

Time passed once more.

Unlike earlier, we no longer let our eyes wander over each other’s bodies.

By the end, our gazes had returned—settled on each other’s eyes.

No physical stimulation could outmatch the quiet, fulfilling intimacy of a shared look—of truly seeing one another.

It had been a long time since we’d stared into each other’s eyes this deeply without even a kiss.

Knowing how much Keirsey loved kissing, I could tell she was holding herself back. If she could have, she would have kissed me already.

I wondered—would it be possible tomorrow?

If so, it might be a deeper kiss than ever before. I was beginning to understand why she had chosen this slow, intentional path.

And somehow, I was already looking forward to what tomorrow might bring.

“…Oppa, just one thing.”

“Go ahead.”

“For the next five days… don’t have any kind of affectionate moment with any of the other girls.”

I could understand what she meant. If I were to release that tension somewhere else, it would ruin the meaning behind her careful restraint.

“…I promise.”

I already knew it would be easier to simply avoid creating that kind of atmosphere around others. And maybe it was for the best that the paperwork with Daisy was finished.

“…Oppa, it’s time now. Close your eyes and sleep.”

“…Alright.”

But neither of us closed our eyes.

“…Oppa. You can sleep, really.”

“I know.”

Still, I kept watching her. And for a moment, Keirsey’s expression faltered. Her eyes filled with tears.

“Why are you crying again?”

“…It’s nothing. I’m just happy.”

She smiled, lifting the corners of her lips. I instinctively reached to brush her hair, then hesitated.

Keirsey looked like she longed for my hand, but I curled it into a gentle fist and lowered it.

“…Just the hand.”

“…Huh?”

She mumbled something softly.

“…Let’s just hold hands while we sleep.”

With those words, she partially lifted the restraint we had set.

Maybe she realized she wouldn’t be able to sleep without at least that.

I gently offered my hand, and Keirsey interlocked her fingers with mine.

A pleasant jolt passed between us, like a current running through our skin.

Keirsey flinched and bit her lip briefly.

At the same time, a deep sense of calm washed over me—something warm and secure nestled in my chest.

That security allowed my mind to settle. Sleep crept in, slowly and peacefully.

“…Let’s sleep now, Keirsey.”

“…Mm.”

With our fingers tightly clasped, we both closed our eyes.

The next day, when I saw Keirsey again, something felt different.

There was a strange aftertaste in the air—as though something special had happened the night before, and the moment still hadn’t ended.

It felt like an invisible thread now tied us together.

If she was holding back her desires just as much as I was, then in its own way… it was kind of alluring.

Just imagining her going through the day pretending everything was normal, all while holding those feelings inside, gave me a strange, guilty thrill.

Even so, Keirsey brought me stamina-rich meals again. Morning, noon, and night—she didn’t skip a single one.

If the final day was truly going to lead to intimacy… I couldn’t help but wonder how she planned to handle it.

She was delicate, after all. Wouldn’t it be too much for her?

But then again… she was the one setting all this in motion.

We shared our meals in silence that day. The air between us carried a subtle tension.

It had only been one day, and already things felt this charged.

Thinking about it now, it really was surprising.

Because it was Keirsey.

Just weeks ago, I could never have imagined sharing this kind of atmosphere with her.

The second night came quickly.

After washing up and returning to my room, I found Keirsey once again lying on my bed—nude, just like the night before.

As though it was completely natural.

We hadn’t said a single word about tonight. No hint, no jokes, no plans. Nothing during dinner.

And yet, there she was, waiting in the most vulnerable state.

“…Come on, Oppa.”

She was clearly restless, her voice laced with urgency.

I had no idea how she’d managed to keep all this bottled up all day.

But I was in the same boat.

Whether from holding back, being aware of her all day, or the cumulative effect of her meals… I was reacting more strongly now.

Of course, Keirsey’s appearance certainly played a role. I’d already memorized every curve of her enticing body.

Naturally, I took off my clothes.

When she saw how I had reacted, she seemed to smile—just a little.

Maybe she felt glad that I was aroused by her.

“What are we doing tonight?”

I asked as I got onto the bed. She suddenly reached for my arm and pulled me close.

“Ah.”

She placed our arms against each other, gently caressing the sensitive skin of my forearm. That same soft, tingling sensation returned.

“Starting today… we can touch each other’s arms. And…”

She suddenly leaned forward and placed a soft kiss on my lips.

—Chuu.

“Haa… haa…”

She didn’t even finish her sentence. Her eyes glimmered with emotion as she looked up at me.

And then came another kiss. And another.

—Chuu. Chuu. Chuu.

Lips, cheeks, nose, eyes—she kissed them all with light, fluttering pecks.

“And light kisses… those are okay now too.”

“That’s it?”

It still wasn’t enough for me.

My instincts kept urging me to touch Keirsey—something I had been holding back since last night.

That restraint didn’t simply vanish.

Keirsey nodded slowly, as though it took effort.

“…Yeah. This is as far as we go tonight.”

In the end, I gently pulled her closer and gave her a light kiss on the lips.

“Ah…”

Her body trembled at the touch.

Even though I knew I should hold back, I continued to press soft kisses against her lips.

Now that I think about it, I don’t think I’ve ever been this forward with her before.

And from those small gestures alone, Keirsey was already becoming overwhelmed.

Her half-lidded eyes seemed to shimmer with affection.

Her cheeks and ears turned a deep crimson.

She was visibly reacting—small signs of arousal showing in subtle ways, from the way her fingers twitched on my arm to the way her body squirmed.

Even so, I didn’t stop.

I kissed her nose, then her beautiful eyes.

Her cheeks, her ears—I showered them with affection.

Each time I moved closer, Keirsey returned a kiss somewhere—on my face, wherever she could reach.

The soft sound of kisses filled the room.

Finally, I placed a longer kiss on her lips. It wasn’t deep—we didn’t use our tongues—but it brought a moment of quiet satisfaction.

Just then, Keirsey’s lips parted slightly.

Something warm brushed against my mouth.

I had thought we agreed to keep things gentle tonight. Startled, I pulled back—but Keirsey gazed at me with a hazy, dazed expression. It was as if she couldn’t understand why I had stopped.

She looked at me like she was asking, why aren’t you continuing?

Then, realizing what she had done, Keirsey suddenly covered her mouth, embarrassed by the way her desire had shown itself.

Seeing her lose control like that only stirred something deeper in me.

I always thought she had this clear line between what she would and wouldn’t allow. That she had more composure than me.

But she was simply holding herself back—struggling with restraint just like I was.

“…S-sorry.”

She whispered.

“…It’s alright.”

I accepted her apology and continued giving her gentle kisses.

Eventually, that one slip didn’t seem like a big deal.

As the kissing went on, her lips would part without her even noticing, and our hands kept brushing each other’s skin.

Her expression melted into a quiet daze. It was getting harder and harder to stop the momentum.

So before things could go further, I forced myself to bring it to a close.

“…Keirsey, let’s sleep now.”

“…Huh?”

“…It’s getting too hard to hold back.”

With so many limits placed on us, I felt like I was suffocating.

I liked taking things slowly with her, but desire didn’t always wait patiently.

Her soft skin kept brushing against me, sparking reactions I couldn’t easily ignore.

If I hadn’t kept myself in check, I probably would’ve crossed the line by now.

Any hesitation I once had from seeing her as a little sister had already been erased by the sheer intensity of the situation. In fact, that lingering familiarity might have only made the temptation worse.

Keirsey must have felt the same, because she nodded in understanding.

We lay there, face-to-face, our noses nearly touching.

And when the urge became too much, we gave each other another soft kiss.

Just like that, our second night ended.

Third Night

Once again, we faced each other—bare skin and all.

The truth is, this was the moment I’d been waiting for all day.

I was beginning to understand Keirsey’s intentions more clearly.

Just like she had hoped, I had spent the entire day thinking about her.

I couldn’t help but wonder—what would tonight bring?

Her eager expression from the night before kept flashing through my mind, and I found myself growing tense with anticipation throughout the day.

As soon as I undressed and climbed into bed, ready to ask her how we would proceed tonight, Keirsey suddenly threw herself into my arms.

“Keirsey?”

“Haa… Haa…”

It was as if, the moment she unshackled her restraint, all her pent-up desire came pouring out at once.

“Tonight… haa… we can hug…”

Keirsey wrapped her arms tightly around my waist, holding on as if she never wanted to let go.

Then, her lips met mine—not gently, but with urgency, almost crashing together.

She could no longer restrain herself. Her tongue pressed into my mouth, deep and searching.

I held her just as tightly, feeling the sensation of her warmth as our tongues intertwined—slick, hot, and increasingly bold.

“Paha… and kisses too, haa…!”

She tried to speak each time we briefly broke apart to catch our breath, but even mid-sentence, she leaned in again, unable to hold herself back.

Her tongue once again swam through my mouth.

“Paha… we can kiss too, Oppa. As long as it’s not sensitive places, touching’s okay…”

She didn’t know what to do with her own hands.

One moment she was clutching my back, the next gripping my shoulders tightly. Sometimes she pulled at my arm to wrap it around herself, other times she dragged me closer by the neck, locking our lips together.

The kisses never ceased. Passionate, overwhelming, relentless—her tongue twisted with mine, exploring and chasing as if it were trying to catch me.

Saliva mixed between us, lips wet with heat.

It was the kind of kiss that felt more like mutual craving than affection—a raw, carnal connection.

Her chest pressed firmly against mine, soft yet intense, and I felt every contour.

I held her tighter, cradling her waist with one arm, bringing our bodies close as I deepened the kiss.

Her back arched gently in response, surrendering herself to me.

She looped her arms around my neck and melted into the kiss.

Even the moments when our lips parted felt wasteful—we breathed through our noses just to keep going.

Eventually, like collapsing into each other, we sank onto the bed, still tangled up.

It was difficult keeping our more sensitive areas from touching.

Her body was already warm, flushed, and unsteady beneath me.

Every now and then, her hips twitched restlessly, and it made my heart ache.

More than once, I found myself wanting to comfort her—to reach out and ease that heat she was clearly feeling.

But I held myself back. We’d come this far. I didn’t want to break what we were building on the third night.

Still, somewhere deep inside, something stirred.

The longer this went on, the stronger the hunger became.

She had to know it too—how much I was holding back.

And when the day came where nothing held us back… she’d have to take responsibility for igniting this fire.

There was something alluring about the way she crossed boundaries without hesitation, unafraid of the aftermath.

She kept feeding me those meals, acting seductively, yet placing limits.

There was something defiant in that—something that made my heart pound all the more.

“Haa… haa…”

We pulled away, panting.

Our skin, pressed together, was warm and soft.

Every time a little space opened between us, Keirsey closed it again with sticky, affectionate closeness.

I stifled another urge to run my hands over her body, to squeeze and kiss her wherever I pleased.

Even controlling my breathing was getting hard.

I pulled her into my arms and whispered directly into her ear:

“…You’ll pay for this.”

“…Hnnh…”

“You hear me, Keirsey?”

Maybe agreeing to her request had been a mistake.

If I’d known this was what she meant, I might’ve thought twice.

This desire, layered slowly over days and never released, had built up into something fierce.

It wasn’t just the emotions—whatever she put in those meals seemed to stoke the heat in my body too.

“…So, the day after tomorrow… that’s when we finally cross the line, right?”

“…Hnngh… mm… yeah…”

She nodded, her face buried in my chest, gasping for air.

“…Even if it hurts, I won’t stop. You understand that, right?”

I told her that clearly. It wasn’t a threat. It was the truth. I was reaching my limit.

“…That’s… what I want…”

I clenched my jaw.

She knew I couldn’t touch her right now—and yet she kept teasing, provoking, pushing my limits.

She didn’t even have the experience to understand what she was stirring up—but she barked like a little puppy who didn’t know fear.

Even a strange sense of conquest began to take root in me.

After that, we once again pressed our bodies together, locking lips in another deep kiss.

It had been a long time since we kissed like this—so wildly.

Sucking on each other’s lips, twining tongues, breath mingling for what felt like forever.

It was the longest kiss we’d ever shared. I couldn’t even tell how much time had passed.

The only clue was that, by the time we finally ended it, the moon had traveled far across the sky.

“…That’s enough. Tonight is over. Let’s sleep.”

Even our lips were swollen.

After so much kissing, Keirsey’s mouth glistened with a sensual shine.

I gathered her into my arms.

Caressing her back gently, I tried to calm my body down.

Because I knew—if I didn’t end this here, the night would never end on its own.

Fourth Night

Once again, our bodies were entwined.

Though we were technically holding back, it felt like we were two serpents from the myth of Praister, coiling and exploring one another.

Our lips were almost constantly connected, and by now, our bodies naturally pressed close.

Tonight, we could finally try a position that Keirsey liked.

She straddled my thigh, leaning forward so her stomach pressed against my abdomen.

Since we had agreed not to let our most sensitive areas touch, I carefully lifted her thigh to prevent any accidental contact.

Even so, there were times when we did brush against each other—and every time that happened, Keirsey would shudder and go weak in my arms. I had to clench every muscle to keep myself from reacting more.

Tonight, I was finally allowed to touch her chest.

As my fingers explored, Keirsey couldn’t suppress the soft moans that escaped her lips. It was the first night she couldn’t hide them.

I didn’t want to be the only one losing control. I wanted to make sure she felt just as overwhelmed. Even though the look on her face already told me she was nearing her limit, I still wanted to push her a bit further.

Her chest—surprisingly full—was something I gently caressed, sometimes teasing with my lips. I resisted the urge to bite down too hard, even though the temptation was strong.

Tonight was the night we could touch each other more freely.

Keirsey began leaving small kisses along my neck, marking me.

Maybe it was payback for Asena having done so in the past—or maybe she simply wanted to claim me. But it felt like she was in a trance, possessed by the desire to make me hers.

“You’re mine…! Mine alone…!”

Each time she pulled away from my neck, her voice was thick with possessiveness.

It was as though she was trying to write her name on my skin, to leave a mark that would never fade.

“Oppa, say it—say who you belong to!”

Even though I was still bound by the rules we had set, I couldn’t respond sweetly. Like her, I wanted to push back. I wanted to make her as frustrated as she made me.

“I don’t belong to Keirsey.”

That set her off.

In response, she sank her lips deeper into my neck, biting with exaggerated passion.

“No! You’re mine! Even if you marry someone else, you’ll still be mine! You’re only mine!”

I gently pushed her down onto the bed.

With one hand on her chest, I held her upper body steady and leaned in to kiss along her stomach.

“Haah… aah…!”

She twisted beneath me, overwhelmed by sensation.

Sweat beaded along her skin, releasing a soft, alluring scent.

Keirsey had been hiding this side of herself.

I moved between her legs.

Looking back, maybe I should’ve held her like this four nights ago.

If I shifted just slightly, it would’ve been a position where everything could happen.

Looking down at Keirsey as she tried to steady her breathing, I gently took hold of her ankles and lifted them.

She flinched, quickly covering herself with her hands.

“W-we’re not going that far yet…!”

I wasn’t planning to.

I only meant to continue with gentle affection.

Sheepishly hiding herself in that vulnerable position, Keirsey melted again under my touch as I left soft kisses along her calves.

“Hnn… ah…”

I slowly trailed my lips upward—ankle, behind the knees, thighs.

The closer I got to her most sensitive place, the more she trembled.

Eventually, I kissed the soft skin around her inner thighs.

“Huup…!”

She tried to close her legs, to hide herself—but I held them open with gentle pressure.

Without ever touching her directly, I let my breath graze the area.

Even that made her breath hitch, her body trembling, and the signs of arousal grew stronger.

Her hands fidgeted toward her lower body, clearly struggling to hold back.

“Don’t,” I whispered.

I gently restrained her hands with one of mine and continued focusing on the areas around, not quite touching what she most wanted.

“Aah… Oppa…”

Eventually, she gave up on moving and gripped my hand tightly instead.

Her fingers twitched, her whole body reacting with need.

She was the one who had asked for this slow path, and now even she looked like she didn’t know how to endure it.

I couldn’t help but wonder—just how far was Keirsey willing to go to drive me crazy?

Even without touching her most sensitive place, I slowly pulled myself up and leaned forward over her.

We didn’t let our lower bodies meet. Instead, I rested my forehead against hers.

Our breath mingled between us as we looked directly into each other’s eyes.

After a soft brush of our lips, I asked her quietly:

“…Tomorrow… I’ll be free to do as I please, right?”

“……”

Keirsey took a long breath and nodded.

It was clear that she, too, had reached her limit.

My body tingled from head to toe. The heat wasn’t just physical—it was emotional, mental, and deeply rooted in the tension we’d built.

Even now, I had to hold myself back.

All this time, the meals Keirsey had been giving me—their effects weren’t just metaphorical.

And yet again, I found myself sighing and asking her,

“Keirsey. This might be too much… maybe tomorrow, don’t give me any more of that stamina food. Oppa’s really—”

“No.”

She cut me off firmly this time.

“…Eat it. Until tomorrow. You said you’d prove your love, remember?”

I exhaled heavily through my nose, accepting it with a quiet nod.

“…Alright.”

“Then tomorrow… I’ll let you do anything you want.”

Once again, Keirsey spoke with that smug confidence of hers—despite being at her own limit. As though she were offering me a favor, when she clearly needed it just as much.

I quietly vowed to myself:

It won’t go the way she thinks.

That night, we held each other tightly as we fell asleep.

Desire wasn’t the only thing stirring in us anymore.

With each passing hour we spent close like this, the emotional bond between us grew deeper. This warmth, this tension—it brought us even closer.

Over the past four nights, our bodies had grown completely attuned to one another.

And so had our hearts.

Keirsey’s body now felt familiar to me. I didn’t need to search or explore anymore. I already knew every curve, every place she reacted to my touch.

And somewhere along the way, I stopped seeing her as a younger sister.

Now, I saw her only as a woman.

Suppressing the pounding of my heart, I closed my eyes and looked forward to what tomorrow would bring.

Fifth and Final Night

That morning, like always, we shared a meal with the others.

We often ate lunch or dinner separately, but breakfast was still a time when we all sat together.

Today, though… things were different.

The table was wrapped in silence.

Even Daisy, who usually led conversation with ease, kept glancing at me, saying nothing.

They had to have noticed.

The air between Keirsey and me was thick with something unspoken—undeniably intimate.

My cheeks were flushed. My breathing uneven. Even the way I blinked had changed.

Despite it all, I remained aroused throughout the meal.

And with that came a rising frustration toward Keirsey—mixed, strangely, with how deeply I wanted her.

No one dared speak about the visible kiss marks on my neck.

But everyone saw them.

It was undeniable now—something powerful and private had formed between Keirsey and me.

Perhaps it was because of Asena’s earlier promise not to interfere, but no one tried to come between us.

Not even Asena herself.

Our eyes met briefly across the table.

For a fleeting moment, desire surged between us—then cooled just as quickly.

It wasn’t time yet. Not quite.

Keirsey stood up.

“……”

Even from where I sat, I could feel the aura she gave off.

Swollen lips from endless kisses. Her chest appearing fuller, her movements more fidgety than usual. That subtle, feminine fragrance. Blushed cheeks and hazy eyes.

There wasn’t a single woman here more ready for what was about to happen than Keirsey.

She turned and spoke:

“…Just for today. Please let me have Oppa to myself.”

With that, she walked away.

It was a declaration.

Yet, again, no one said a word.

Not even her twin, Asena—who only looked at me with quiet jealousy, then returned to finishing her meal.

My night began early.

Unlike the past few days, Keirsey brought me dinner much earlier. It wasn’t hard to guess what that meant.

Once the meal ended and I took a bath, the night would begin. We could wait no longer.

She still hadn’t grown tired of feeding me those stamina-rich meals. By now, all I could do was let out a hollow laugh.

I couldn’t be more aroused. I had already reached my limit—just like her.

And yet, Keirsey kept asking for more.

Kept asking me to keep wanting her.

I slowly began eating.

While I did, I stared at Keirsey intently.

What she saw in my gaze, I couldn’t tell—but after a while, she let out a shallow breath and turned her head away.

Was it fear starting to creep in—or anticipation? I couldn’t say.

After she cleared the dishes, I went straight to wash up.

Then returned to my room to wait.

Five days.

Short, if you think about it—but it had felt like an eternity to me.

Being pushed to the very edge of basic human desire, then forced to hold it back—it had worn me down.

I took off my shirt, closed my eyes, and exhaled slowly.

A moment to settle myself before everything began.

—Creak.

The door opened.

Keirsey stepped inside, wrapped in a large towel.

—Click.

She closed the door behind her.

And just like that, the towel slid from her body.

Keirsey stood before me, completely bare.

“…There are no more restrictions tonight, Oppa.”

She walked toward me with slow, sultry steps. My heart pounded hard enough to shake my ribs.

“…Hold me,” she whispered, climbing onto the bed.

We reached for each other at the same time, crashing into one another like we would stop breathing if we didn’t.

My pants were off in an instant, our bodies pressed bare against each other—so familiar now, more so than any clothing ever could be.

I ran my hand down her back, tracing the line from her neck to her waist.

“Haa…!”

With a push, I laid Keirsey down on the bed.

She hit the mattress with a soft thud, eyes burning with want.

Looking at her, I knew—this was the moment. The time to finally release everything we had built up.

“…Please, Oppa… I want you.”

Her voice trembled with desperation.

As expected, her body was already soaked with desire.

There were faint, glistening trails running down her thighs—evidence of how long she’d been waiting.

Still, I didn’t plan to give her exactly what she wanted. Not yet.

Even if it was harder on me, I wanted her to lose control for me first.

I gently parted her legs.

She didn’t resist. In fact, she spread them further for me.

It was the first time I touched her there.

Swollen, sensitive, and visibly yearning for contact—just brushing her skin caused her body to quiver.

“Hhnnng…!”

She was already more than ready to receive me.

But instead of doing that—I brought my lips to her inner thigh.

“Hyah…!”

Her legs twitched instantly. Both her hands flew to my hair, clutching it tightly.

I could feel her heart pounding through every inch of her.

Her breathing came fast and shallow.

Instead of rushing, I took my time. Slowly, gently teasing her with my lips.

“Aah…! Aahh…! O-Oppa…! You could just… just come in already…!”

I didn’t reply. I continued what I was doing, feeling her thighs press against my cheeks, her fingers tugging harder at my hair.

With my free hand, I caught her wrists, gently but firmly—so she couldn’t push me away.

“N-no… I can’t take it…! O-Oppa, stop…!”

Even though I brought her to the edge first, I didn’t regret it.

She needed to know—this wasn’t just about doing whatever she wanted.

It was about surrendering, completely.

I moved as if kissing her—slow, careful, and deliberately focused.

And just like that, Keirsey arched her back and came undone.

—Pulse. Tremble.

But I didn’t stop.

Even as her body convulsed, even as she whimpered and gasped—even when she twisted and pressed against me, tugged at my hair, or wrapped her legs around me—

I didn’t stop.

I continued to stimulate Keirsey’s trembling body without pause.

“Ah…! A-Aah! Hhng…!”

She writhed beneath me, overwhelmed. Her body struggled to absorb the waves of pleasure crashing through her.

By the time her first climax had passed, her expression had melted into a dazed haze. Saliva dripped from the corner of her mouth, and any traces of the innocent girl she once was had vanished.

“O-Oppa… please… n-no more…”

But I didn’t stop.

Not until she had reached her peak seven times.

Maybe she had hoped for something more—emotional intimacy, the sense of being held, of being one—but what I gave her was purely physical. I gave her pleasure—intense, overpowering pleasure.

“P-please… Oppa…”

She could barely form words anymore. Her eyes fluttered, unable to stay open, her voice reduced to soft pleading.

Finally, I lifted my face from between her legs and asked her quietly:

“Be honest. You liked it, didn’t you?”

Just looking at her face made the answer obvious. Though her body twitched in overstimulation, her expression—flushed, lips barely curved in ecstasy—betrayed her true feelings.

She didn’t answer.

But that silence spoke for her.

“…I-It felt good… but you’re supposed to… be inside now…”

“Nope. You’re going to pay for torturing me for days.”

“I-I couldn’t help it… I was struggling too…”

“I ate every meal you gave me. I avoided all contact with other girls. I held everything back, just like you asked. So don’t you think I’m allowed to tease you a little?”

“T-There was a reason…!”

“A reason?”

As I spoke, I flicked my tongue lightly over her sensitive spot once again.

Every time I did, Keirsey’s body jolted with a shock of pleasure, but she pushed through and spoke between gasps.

“T-The reason I didn’t let you… for five days…”

“There was more to it than just teasing me?”

She nodded frantically, eyes begging for a pause, for a breath.

“Tell me.”

Clutching my hair, her thighs tightening slightly around me, she finally said it in a trembling, embarrassed voice:

“…Today is… the start of my ovulation.”

“…What?”

“If we do it today… there’s a chance I’ll get pregnant…”

In that moment, a memory flashed—Asena had once said:

“Six more days and it would’ve been my ovulation window. Or… we could try again then.”

That had been six days ago.

Keirsey came to me the day after I had been with Asena.

Which meant… five days had passed. Today was day six.

I had nearly forgotten.

Keirsey and Asena were twins.

And naturally, their cycles were synchronized.

Her words lit something deep inside me.

Something primal.

The instinct to pass on life stirred, thundering in my chest, making my hands tingle with heat.

For a moment, the thought crossed my mind—was this what they called a death by pleasure?

Keirsey still had her fingers buried in my hair, her voice trembling.

“…I-I don’t hate this. What you’re doing… I really… really like it.”

“……”

“It feels like I’ve conquered you… that the Oppa I love is giving me all of himself… it’s like a dream…”

Her eyes were hazy, half-lidded with satisfaction, her voice barely a whisper as she swallowed.

“…But tonight… please… I need you inside me. Oppa…”

She paused, a trace of bitterness flickering in her tone.

“Unnie already took your first kiss and your first time…”

She wasn’t wrong—my first time had been with Judy—but it wasn’t something I felt the need to bring up now.

“Then at least…”

Her eyes burned with jealousy. That deep, hidden yearning she’d kept sealed finally showed on her face.

“…Let me carry your first child.”

I lifted my upper body, pulling away from between her legs.

“Come on… Oppa… Please stop teasing me already…”

Taking a deep breath, I steadied my thoughts.

Her voice nearly made me lose control.

Penetration—it was going to happen eventually. There was never any intention to stop. Keirsey was just trying to pull that moment closer.

And honestly… I wanted to make her squirm just a little longer.

“…Still, no. Do you even know how crazy you’ve been driving me?”

“Ah…! O-Oppa…!!”

She cried out in frustration, her voice rising.

I gently cupped her chest, teasing her hardened nipples with soft fingers.

“Hnng…!”

Keirsey squeezed her eyes shut, biting back the pleasure coursing through her.

My hands glided softly across other parts of her body, stirring her arousal even further.

When she opened her eyes again, they shimmered—wet with longing. Looking up at me, she whispered:

“…Oppa… mm…? Please, don’t tease me anymore…”

“……”

She swallowed hard, her lips parting and closing again, unsure of what to say. Maybe she finally realized that simple words weren’t enough to sway me.

Her eyes widened in a pleading expression.

“…Please… okay?”

It had always been like this, then and now. Whenever Keirsey desperately wanted something from me, she’d switch to formal speech. She knew I couldn’t say no when she did that. Even back when I’d been angry, she’d often softened me with those words.

It was her secret weapon.

“Oppa, I love you. I’m begging you…”

“…Haa.”

And like always, her special move worked flawlessly.

“…Please, stop teasing me now. And… put it in me…”

That was the final blow. I gave in to the temptation.

I couldn’t hold back anymore either.

Adjusting my position, I aligned myself with her entrance.

It was time to end five days of unbearable restraint.

Keirsey clutched her chest, trying to calm her ragged breathing.

Our eyes met.

No words were needed—we understood each other perfectly.

—squelch…

Slowly, I entered her. We both sucked in a breath.

The heat inside her seemed to melt around me, drawing me in completely.

I could feel the tightness parting for me, a space that had never been opened before—now making room.

And then, I felt it. Her barrier.

But I didn’t stop. I pressed forward.

There was no turning back now.

—pop…

“Hnnng…!”

As I broke through, Keirsey let out a soft cry. My length sank deep into her fully.

Even that one act left us drenched in sweat. We didn’t need to move—waves of intense sensation flooded us both.

All the pleasure we’d held back crashed in at once, overwhelming.

I collapsed forward, resting on her.

As always, we held each other in a tight, sticky embrace. But this time… something had changed.

Now, we were truly one.

“…We should just stay like this,” she whispered between shallow breaths.

And in that moment—I finally understood.

“…You’ve learned how to do all this somewhere, haven’t you?” I asked.

Keirsey didn’t deny it.

She leaned close to my ear and whispered.

“…Yeah. I picked up a few tips.”

“From where?”

“…A bar.”

“……”

For a second, I was speechless.

But before I could say anything, Keirsey continued.

“I told you, Oppa… I’m not pure. I just pretended to be, so you’d love me more. For that… I’d do anything.”

“…Keirsey.”

“No matter how much I read or studied, I couldn’t figure it out. But when I remembered how my sister would cry out in bed… I just knew. She was happy. She had good sex. And I didn’t want to lose to her.”

“…”

“You’re supposed to love me the most, Oppa.”

Suddenly, a memory of Keirsey as a child surfaced.

She used to trail behind me, her eyes gleaming like marble beads. Just a light scolding would bring her to tears, and she’d come running for comfort. When praised, she’d beam like an idiot—completely overjoyed. That puppy-like Keirsey… had now grown into a woman who could take me into her mouth and seduce me with tricks she’d learned from a bar.

She swallowed hard, then spoke.

“Oppa… Do you remember what you once said to me?”

“……”

“You… called me a whore.”

Guilt twisted in my chest. I sat up, the weight of past mistakes crashing down.

“Keirsey… I didn’t mean that. I was—”

But Keirsey tightened her arms around my waist, stopping me from rising.

“—It’s okay.”

She looked at me, unwavering.

“What?”

“I don’t care if you call me a whore. Because I am yours. I’ve always been yours.”

The words coming out of her mouth were so brazen, I almost blurted, Is she insane? When had she become like this? She used to seem so innocent… and now, in just a few days, she’d transformed into someone who could say things like that so easily.

I asked quietly.

“…Didn’t you say we shouldn’t move?”

I had to admit it—I’d lost again. Even now, I was chasing pleasure.

“……..”

Keirsey couldn’t bring herself to answer.

“Keirsey. Please say something.”

She bit her lip. Her expression twisted with frustration—as if she were on the verge of breaking, desperate to move but holding herself back.

“…We’re not supposed to…”

It was like she was clinging to some kind of instruction she’d memorized.

Before long, her eyes brimmed with tears.

“…We’re supposed to stay like this for a while… But I… I’m struggling too, Oppa…”

I lowered myself over her again, gently embracing her.

One arm cradled the back of her head, the other pressing her close, resting on her crown.

I held her tightly, like something too precious to let go.

We stayed that way for a while. I didn’t move. I didn’t try to provoke her again.

Even still, waves of pleasure rippled through us. Any slight movement caused us both to jolt in unison. The stimulation was almost unbearable.

As things finally began to calm, I tried to shift the mood, asking her something that had been on my mind for a while.

“…Back when you said you used to fantasize about me while touching yourself… How did you do it?”

It was something Keirsey had admitted weeks ago. And I’d always been curious.

“Hnnn…!”

She quickly hid her face behind her arms, clearly embarrassed.

I brushed her arms away, teasing her.

“Come on, Keirsey. Tell me. How did you do it?”

“O-Oppa…”

“Show me. I want to see.”

“I… I’m really embarrassed…”

“Still… I want to know.”

“……”

Keirsey hesitated for a long while. Then she glanced down at where we were still connected and whispered softly.

“…You won’t hate me after seeing it, right…?”

“What are you saying? You only look more adorable to me.”

Her small hand shyly moved, then slowly began circling her most sensitive spot.

“…Like this…”

I placed my hand over hers, guiding it in tighter, faster circles.

“Ah…! Hngh…!!”

Her body trembled as she reached her climax, clenching tightly around me.

Keirsey shivered uncontrollably, overwhelmed.

And finally, when that pleasure had ebbed away… we both realized it was okay to move again.

Time had passed—and at this point, there was no reason to hold back.

Keirsey’s body had completely molded to the shape of mine. We were one. That was enough of a signal to continue.

As I began to move my hips, we both fully experienced the sensation of being completely joined.

The emotions were overwhelming.

It wasn’t just physical pleasure anymore—what hit us hardest was the emotional release. It was so intense that words couldn’t do it justice.

Our eyes didn’t wander. We stayed locked in that gaze.

—Thrust…! Thrust…! Thrust…!

“O-Oppa…! Hngh…! There—ah!”

I moved slowly, letting the moment stretch on.

The love in her eyes—pure, unfiltered—reached me more deeply than any word could.

Her toes curled and uncurled from the sensation. Occasionally, a tear would trail down her cheek. Not from pain—but from an overwhelming happiness she couldn’t contain.

And I felt the same.

The tension began to build inside me. Normally, I didn’t release so easily. But right now, nothing was normal.

“Keirsey…”

As I murmured her name, she seemed to already know what I was feeling.

“Do it, Oppa… Please… Make me pregnant. Give me our baby.”

The word pregnant lit a fire in me.

The pressure spiked to the limit. I drove into her deeply, fully, one last time.

All the instincts she’d stirred in me these past days took over.

There was only one desire now—to make her mine, completely.

I didn’t hold back anymore and finished inside her. And somehow, the intensity only added to the guilt, as if I was staining her.

But with that release came a wave of satisfaction I couldn’t explain.

Whether it was from holding back for too long, or from everything I’d eaten over the past few days—I released in full force, more powerful than I ever had.

The last time had been with Asena, and I’d thought that was my limit… but now, I’d gone even further.

Never before had I experienced something this intense.

Even the aftershocks of pleasure refused to fade. I could barely stay conscious.

Keirsey trembled beneath me, her legs quaking as she withstood the pleasure.

Her hips arched on their own.

And when the climax finally passed, our eyes met again.

I started to move once more.

We didn’t need to say it—we both knew we weren’t done yet.

It was only after the eighth climax that the night finally came to an end.

I kept going until Keirsey was completely exhausted.

The girl who once seemed so innocent… I’d marked her, taken her further than I ever thought I would.

Though honestly, calling it “dirtying” her didn’t feel right—because what we shared was overflowing with love.

Morning was breaking.

Her entire body was covered with signs of what we’d done—and mine was just as soaked in her essence.

“Haa… Haa…”

As I pulled out, her body released what remained, like a bottle popping its cork. The aftermath spilled from her—thick and warm.

She didn’t need to say it. I knew I’d gone overboard.

Even seeing her body react that way brought a strange sense of satisfaction. As if I’d claimed her. The pale traces left behind felt like a flag—like a sign that she was mine.

After wiping off what we could, we collapsed beside each other, utterly spent.

A cool morning breeze flowed in through the window I’d left open earlier.

Face down, she murmured softly.

“…I love you, Oppa.”

“…I love you too.”

I gently pulled her into my arms, not wanting her to be uncomfortable.

Sliding one arm beneath her head and holding her close, I made sure she could rest easily.

Her arms trembled, but she still reached out and hugged me back.

“…Oppa.”

She called out to me.

“…Oppa.”

“…Yeah?”

“…Do you think our baby will know?”

She gently stroked her belly as she asked.

“…Know what?”

“…That their mom and dad made them… out of such happiness.”

I leaned in and placed a soft kiss on Keirsey’s forehead.

I didn’t respond with words.

In a quiet, tired voice, she called me again.

“Oppa…”

“Hmm?”

“…Thank you.”

“For what?”

“…For appearing in my life.”

“………”

This time, I gave her an answer.

“…I’ll keep making you happy. From now on, too.”

Keirsey nestled her face into my chest. I could feel the warmth of her tears rolling down.

“…Mm.”

She whispered her reply.

And one month later, we received the news—

Keirsey was pregnant.