If She Finds Out, It's Game Over

A message arrived on Yuna's smartphone that morning, vibrating along with her alarm.

Yuna didn't think much of it at first. Oppa probably stayed up all night staring at charts on his computer again and slept in late, she figured. But just in case, she gave him a call—only to hear the cold automated response.

"The phone is powered off. Please leave a message after the tone…"

"Sigh, guess I have to go wake him up myself."

Yuna clicked her tongue and got up from her seat. On the way, she decided to swing by a nearby shop to grab some porridge to soothe her empty stomach—and his.

When she arrived at her oppa's officetel, Yuna politely knocked on the door as a formality.

Knock knock—

No response from inside. This time, she pressed the doorbell a bit harder.

Ding-dong—!

"Eep—?!"

In that instant, a strangely high-pitched, short scream leaked from beyond the door. Yuna tilted her head in confusion. It was too delicate for sleep-talking, but at least it proved someone was home.

"Oppa! You asleep? I have the spare key, so I'm coming in!"

She pulled out the duplicate key her oppa had given her anytime she wanted to drop by. With a cheerful beep as the door lock disengaged, Yuna slowly pushed the door open and stepped inside.

Thud thud thud—!!

Rough footsteps scraped across the floor toward her ears. It sounded like someone desperately trying to flee.

"Huh? What's that?"

Puzzled, Yuna passed the entryway and stepped into the room. And there, the 'oppa' she saw was…

A suspicious lump huddled in the corner of the bed, wrapped head to toe in the blanket, trembling violently.

I'm fucked!!

I swallowed my scream from inside the blanket. I had no clue how to even begin explaining this mess. Forget explanations—where the hell was the 'me' who should be the owner of this place? Instead, some chick with ridiculously huge tits was occupying my bed like she owned it. How do you even justify this absurd scene?

And to top it off, all I had on was the single shirt that bastard System gave me.

"…Oppa?"

I bit my lip hard at Yuna's voice from beyond the blanket.

I can't let this go on. Lower my voice as much as possible… Right, I'll stuff the blanket in my mouth. It'll muffle and sound deeper.

Desperately straining my vocal cords, I shoved a wad of blanket in my mouth and replied.

"Y-Yeah, Y-Yuna. I was sleeping…"

But the sound that slipped through the blanket cracks completely defied my expectations. I hadn't hoped for a perfect male voice, but this? What came out was a clear, delicate, girlish whimper mixed with a nasal tone from the pressure.

"Oh my god, why does your voice sound like that, oppa? Caught a bad cold or something?"

Yuna's footsteps approached the bed. Cold sweat trickled down my spine. The ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠shirt, barely buttoned, was on the verge of popping open under the weight and volume of my chest. If she saw the pink silhouette shining through the thin fabric—or the fact I had no bottoms—my social life, not to mention my dignity as 'oppa,' was done for.

"N-No!! I'm f-fine!! A-And don't come closer right now!!"

I yelled desperately, begging her to stay away.

"One of your friends messaged me. If you're sick, you should've said something—instead of suffering alone!!"

Her footsteps drew even nearer. My heart pounded ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠like mad, and the blanket was already stifling hot and damp with sweat. It felt like being trapped in a massive sauna. On top of that, the sensation of the blanket brushing my chest was weirdly distracting—heavy, ticklish, utterly alien.

The shirt alone was crushing my tits; now the blanket's weight piled on top was driving me insane.

"Good thing I brought porridge. Oppa, lift the blanket a bit—I'll feed you."

Oh god, please. Don't tempt me further, Yuna…

I desperately wished this was all a nightmare. But reality was merciless.

"Oppa, you gonna keep this up?"

Finally, a hint of irritation crept into Yuna's voice. Her footsteps had stopped right beside the bed.

"Just leave it there. I'll eat later… alone."

"Sigh, at least one bite."

"…"

Ah, fuck… I'm ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠losing it.

The System window silently ticked down the time. If I couldn't send Yuna away before it hit zero, who knew what it'd do to me next.

"O-Okay, fine. Just… just one bite…?"

With no choice, I barely poked my lips out from the blanket wad. Yuna paused like she couldn't believe it, then sighed deeply and carefully slid a spoonful of warm porridge into my mouth.

"Sigh… That's why you need to exercise more. Look at you."

"Y-Yeah… sorry…"

"Listen to that voice—all hoarse. Rest up. I'm just gonna hit the bathroom quick, then head out. I'm busy today too, you know."

"Y-Yeah… go ahead…!"

Yuna set the porridge bowl down and headed to the bathroom. The moment the door clicked shut, I yanked my head out from under the blanket, gasping for air.

"Hahk, hahk…!"

Sweat poured down my face like rain. Strands of damp hair clung to my cheeks, and the sweat-soaked shirt clung obscenely to my skin, outlining the explosive curves of my chest.

Only a few dozen seconds since Yuna entered the bathroom. But to me, it felt like an eternity.

Please, Yuna. Let me live. Just leave already…

I focused every nerve on the faint sounds from beyond the bathroom door. All I could do was pray fervently.

Was she fixing her makeup or something? Yuna showed no sign of coming out. The mercilessly dwindling numbers gnawed at my heart.

I clenched my trembling fists, but there was nothing I could do. Powerless, I couldn't shred that blue window or stop the impending doom.

Click—

The bathroom door opened, and I frantically pulled the blanket back over me.

"Oppa, take care of yourself!! I'll come again tomorrow or the day after!!"

"Y-Yeah!! Get home safe!!"

I heard Yuna adjusting her shoes at the entryway.

Please, please…! Just go…!

Clack—the sound of her shoe hitting the entryway floor hit my eardrums.

Beep—the door lock disengaged, followed by the heavy door swinging open.

The door fully opened, cold hallway air rushing in just as—

Slam—!

The door shut.

"Hah… hah…"

I threw off the blanket completely and collapsed flat on the bed. My sweat-drenched body made the shirt stick disgustingly to my skin, but the relief of escaping that hellish tension overshadowed it.

My massively swollen tits heaved heavily up and down with every ragged breath.

So stuffy. Feels like I'm dying.

The unbearable pressure made me unbutton ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠a few. My suppressed breasts bounced heavily once more from the release, but I barely registered it. The mental exhaustion was too much. Even with the shirt gaping open to expose pale skin and precarious curves, I just stared blankly at the ceiling, catching my breath.

"You fucking bastard, for real!!!!"

My pent-up rage finally boiled over. I shot up from the bed, cursing at the top of my lungs. The sudden movement sent my heavy tits sloshing wildly inside the shirt, but right now, my murderous urge to tear that blue window apart overpowered any shame.

"Calm down? You think I can calm down right now!!! You fuck—!!"

"…Huh."

The boiling rage subsided like a lie in an instant. My scorching head felt doused with ice water—no, it cooled so fast my mind started to blur hazily.

What… was I just doing…?

I blankly raised my hand. Slender, delicate, elongated fingers. So pretty. Unquestionably mine. A faint unfamiliarity crept from my toes, but certainty that this was my everyday self quickly overwrote it.

I grabbed a lock of hair draped over my shoulder and brought it to my face. Sky-blue sheen, my pride and joy. Everyone always lost it over my hair texture.

"Ah…"

The System window floated before my eyes. Naturally, I smiled brightly and replied.

"Yeah. I'm good now."

"Next quest?"

I tilted my head. It was routine, but this was already the fourth today. The tighter schedule than usual left me a bit tired, a faint resentment toward the System flickering—like a child's petty whine at their parent.

"Ah…♡"

I cupped my flushing cheeks and giggled shyly.

"You don't even need to make this a quest…♡"

A fluffy heat bloomed from deep inside. That sweet, dizzying sensation I craved every night soaked into my hazy mind. To me, it was irresistible salvation—the highlight of my day.

"Hehe… Then, Irina's…♡"

My glazed eyes stared at the floating System window as my hand unconsciously drifted to the shirt buttons at my chest.

"Public masturbation…♡ begins…♡"