Spring Rain Fell
Night carried a peculiar sort of magic.
Yeo-eun looked almost intoxicated by it.
“Back when I was in school, I always had to sit in the very back row,” she murmured.
“Yeah.”
“I was way taller than anyone my age.”
A wound.
She was quietly baring her old scars to me.
“Middle school was co-ed, and the boys were terrified of me.”
“Why?”
“Because I was huge, and my chest was huge. It didn't matter how tightly I wrapped myself in compression bandages. Whenever I tried to approach them nicely, they just shrank away in disgust.”
Yeo-eun had bound her chest until she could barely draw breath, desperate to hide her body from the world.
None of that effort had ever been rewarded.
Peers blinded by prejudice had judged her in an instant, and her genuine voice had never reached a single one of them.
“And the girls were always busy catering to the few boys we had.”
“Yeah.”
“From where I was standing, watching them fawn over guys made me sick to my stomach. So it just got harder and harder to fit in with anyone.”
To my eyes, Yeo-eun was blessed with a magnificent physique.
Long, slender limbs, a small face, and exceptional bone structure and musculature.
I had no idea how her reflexes measured up, but her physical foundation was extraordinary. Had she been born into the world of my previous life, she would have enjoyed overwhelming popularity no matter what career path she chose.
In this world, however, her body had been treated like an outright curse.
Without any major scandal or dramatic fight, she had simply been quietly, naturally ostracized.
“In high school, we moved around a lot,” she continued. “Following Mom wherever her work went.”
“I see.”
Throughout all her talk of childhood, Yeo-eun never once brought up her father. Nor had I ever heard the lady of the house mention a husband. Perhaps there was a complicated story neither felt comfortable sharing.
“Eventually, being on my own just felt more comfortable. Or maybe I just forced myself to think that way.”
“I get it.”
“To put it bluntly, I was a total loner. Pretty pathetic, huh?”
“Hmm? No. Why would that be pathetic?”
From what I could see, Yeo-eun actually possessed a remarkably sturdy sense of self-esteem. Even while recounting such painful childhood memories, she kept a faint smile on her face. She didn't seem trapped in self-pity or bitter about her circumstances.
Which meant the unease flickering in her eyes stemmed from something entirely different.
“Jeongseo. Seriously, tell me the truth.”
“Yeah?”
“You're really not scared of me? For real?”
“Yeah. I already told you that earlier.”
Had my previous answer not been enough?
Hearing my reaffirmation, the same relieved look washed over her features as before.
“Honestly, at first... you were so hard to deal with.”
“I imagine I was.”
“I mean... Mom just brought you home one day out of nowhere and said, ‘Here's your little brother.’”
As she began peeling back the layers of her heart, I pushed myself up and sat straight on the bed. Looking down at me, her eyes took on a look that felt oddly familiar.
“It felt overwhelming, you know? I was sure you'd hate me too.”
“I never once hated you.”
“I know. I know that now. But I'm still so anxious that I keep wanting to check. Do you get what I mean?”
“Anxious? What are you anxious about?”
“Because the way you look at me feels so good... Even when you nag me, I love it so much. And because it feels so good, I'm terrified it'll slip away.”
Anxiety was a truly baffling emotion.
Her words were difficult for me to fully grasp.
“I guess I'm terrible at explaining this,” she muttered, rubbing the back of her neck. “Look... blood really is something else, huh?”
“Huh?”
“You've already become way too precious to me. You're my little brother, but sometimes you feel like the very first real friend I've ever made... It's complicated. That's why I keep asking. If you're really okay with me.”
This woman clearly needed a far stronger dose of certainty.
I rose to my knees on the mattress and planted both hands firmly on Yeo-eun's shoulders.
“Noona. Are you worried that one day I'll suddenly get creeped out by you and start running away?”
“No, not necessarily that, but... things can get awkward between people, can't they? We could drift apart. And no matter how careful I try to be, I'm still a woman, and...”
Hearing her trail off, the pieces finally clicked into place.
I understood why she had been holding back so desperately from crossing the line.
She had been biting her tongue and enduring her own urges with everything she had, terrified of ruining the bond we shared as sister and brother.
“Ugh, seriously.”
“Huh?”
“Relax your shoulders.”
I tried to push her back, but she didn't budge an inch—her frame was rock-solid.
Only after I asked did she finally release the tension in her muscles, letting herself fall backward onto the bed with a soft thud.
“Wait, what's this all of a sudden?”
Yeo-eun lay sprawled across my mattress, looking up at me.
Her long, silky black hair spread out over the sheets like a rich dark carpet. Her pale, smooth skin practically glowed under the dim ambient light. And lying flat on her back, her massive breasts spilled generously outward to either side.
I reached down and cupped one of those magnificent, plump mounds, perfectly rounded like freshly steamed buns.
The soft, squishy texture felt delightful under my palms.
She possessed a truly breathtaking body, one that coaxed dark impulses to life with the slightest touch.
“Noona. You like me, don't you?”
“……”
“Answer me.”
“...Yeah.”
She had often acted like a mischievous brat or a thoughtless kid sister, frequently snapping at me with a pout. Yet right now, her cheeks burned a fiery crimson, blushing like an innocent, bashful maiden.
Seeing her so utterly stripped of her usual bravado made the heat in my veins surge violently.
“I'm not scared of you,” I said, shifting my weight to sit squarely across her thighs. “So don't ever waste your breath worrying about that again.”
I thoroughly enjoyed the angle of her looking up at me from beneath.
“Okay... Thank you. Really, thank you.”
“I can even do things like this.”
Slowly bending down, I took one of her hardened pink nipples between my lips.
There was no practical need to take things this far, of course.
I simply wanted to do it.
I wanted to watch her squirm helplessly beneath me.
Chwop. Slurp.
“Ah... ngh.”
Gripping her bountiful breast with one hand, I suckled deeply on her bud, tugging at it with my tongue. Down below, trapped tightly between her lower belly and my pelvis, my rock-hard cock screamed for release.
“Haah... ah. Jeongseo... Jeongseo! Okay, I get it. I really get it, so stop!”
Slurp.
“Why? Doesn't this feel good?”
“I know what you're trying to prove! You don't have to go this far!”
Her hands clamped around my torso, shoving me upward. Annoyingly enough, my physical strength was no match for hers, and I was forced back upright.
“Wait, what the hell do you have in your pocket?” she asked, breathing hard. “Something's poking right into my stomach.”
“My pocket? There's nothing in there.”
“Huh?”
Her trembling eyes dropped down to my waistband.
My raging erection was tenting the fabric of my pajama bottoms so high it was impossible to miss.
“No way... There's definitely something rock-hard in there.”
“Oh. That's just mine.”
I turned my pajama pockets inside out to prove they were completely empty.
The sound of her swallowing a dry gulp of saliva echoed extraordinarily loud in the quiet room.
How on earth had things turned out like this?
I was lying on my side with my head resting comfortably on Yeo-eun's arm as a pillow. Tucked together beneath a single duvet, I idly kneaded her plump breast with one hand while chatting away into the dark.
“Man, you really are something else,” she murmured, glancing down at me. “Do you actually enjoy groping boobs that much?”
“Yeah. It's fun.”
“Don't normal guys usually find them gross and push them away?”
Earlier, when I had suckled her nipple, I had clearly seen how much pleasure it brought her. Yet she had bitten her lower lip, fought down her breath, and pushed me down onto the mattress, insisting we just talk until we fell asleep.
The information I had researched online and the explanations the doctor had given me couldn't possibly be wrong. Yeo-eun simply possessed superhuman patience. My initial assumption—that she was holding back purely out of fear of damaging our sibling relationship—felt slightly off the mark now. Or rather, there seemed to be a far more decisive reason behind her hesitation.
“Maybe it's because I never got to drink my mother's milk growing up,” I mused aloud.
“What kind of bullshit is that? That doesn't make any sense.”
As we talked, I tossed one of my legs over her thick thigh. It felt surprisingly cozy.
“If you're going by that logic, I never got breastfed either.”
“Really? Your mom didn't nurse you?”
“Yeah. At least, that's what I heard.”
We traded stories of our pasts. Since she had opened up about her childhood, I shared details about how I was raised in the mountain temple—though I left out the part about my emotional detachment.
“So the monk basically found you and raised you from scratch.”
“Whoa... that monk sounds incredible. But what do you mean he ‘found’ you? Didn't Mom leave you with him?”
“Huh? What mom? I don't know who my mother is.”
“What are you talking about? Mom told me you were sick, so she left you somewhere with clean mountain air to recover. I thought you called her ‘Auntie’ just because you resented her for leaving you behind.”
“Wait. Who told you that?”
This was news to me. Details the monk had never once spoken of were spilling freely from Yeo-eun's lips.
“Mom did... She said you'd grown up in the mountains because of your illness, and now that you were all better, she was finally bringing you home.”
“I was sick, that's true. But my body has always been strong.”
“Huh? You were sick, but your body was strong? What the hell does that even mean? Did you have bad atopy or something?”
“No, nothing like that. But wait—is your mom actually my biological mother?”
“Isn't she? Why else would she bring you home?”
Yeo-eun tossed the question right back at me. I had assumed she held all the answers, but the uncertainty plain on her face said otherwise.
“Did she ever explicitly tell you she gave birth to me?”
“Well, obviously... Wait. No, she never actually said those words.”
I relayed the story exactly as the monk had told it to me. This was the only truth I had ever known.
Hearing it, Yeo-eun's face twisted into utter bewilderment.
“Hold on. What...? So she just adopted you onto the family registry?”
“As far as I know, yes.”
“Why would she do that? There's no reason to go that far. If she just wanted to sponsor you, she could have done that without putting you on the registry... Ugh, damn it. I need to ask her right now.”
She looked ready to yank her phone off the nightstand and interrogate her mother on the spot. But our conversation had already dragged deep into the middle of the night, stretching well past my usual bedtime.
“Call her tomorrow. Tomorrow... Yaaawn.”
“Wait, seriously? Then... you're not actually my brother?”
“I am your brother, legally. Don't go back to your room, Noona. It feels too nice right now.”
I had spent my entire life falling asleep alone in an empty room. Naturally, I had assumed having someone beside me would keep me awake, but the reality was shockingly different.
Kneading her soft, warm breast brought an extraordinary sense of peace to my mind. The fiery impulse that had flared up earlier had completely settled, replaced by a profound comfort in holding her close. Her sweet, intoxicating scent and velvety skin felt so soothing that I buried my face deeper against her.
My rigid internal clock began pulling the curtains of unconsciousness over my mind.
“Hey. Hey! What's wrong with you? You're just falling asleep like that?”
“Yeah... sleepy. Feels so cozy.”
“Are you kidding me?! You cop a feel the whole time and just conk out?!”
“Mmm... why not?”
Her exasperated voice faded into the background. Something about being tricked, something about regretting holding back so much. I could have sworn I heard her mutter something about picking up where we left off earlier, but the world slipped away into dark stillness.
The nipple Jeongseo had suckled on like a baby still throbbed with a searing, persistent heat.
Blood had rushed to Yeo-eun's head so furiously she had come dangerously close to pouncing on him right then and there. Only superhuman willpower had allowed her to rein herself in.
Because he's my brother.
Because I thought we shared the same mother.
And now, he was telling her they weren't blood-related at all.
A burst of pure euphoria exploded in her mind like a firework show.
“Jeongseo? Jeongseo...?”
She whispered his name softly, but he was already deep in the land of dreams.
It was utterly absurd.
Who on earth dropped an earth-shattering bombshell like that in the middle of a casual chat and immediately drifted off into blissful sleep?
“Ugh, seriously... haah... Why does he have to keep kneading it even in his sleep?”
Her little brother was driving her insane.
She had never imagined her chest could be this overwhelmingly sensitive. Whenever she touched herself there, she had felt virtually nothing. But under Jeongseo's fingers, the experience was night and day.
His slender, delicate hands continued to rhythmically squeeze her flesh even in slumber, sending electric shivers rippling through every nerve in her body.
In short: she was completely, irrevocably turned on.
Though entirely unintentional on his part, Jeongseo had teased his older sister into a fever pitch of unfulfilled longing. Yeo-eun was the sole, miserable casualty of this cruel emotional whiplash.
“Haah... Stop torturing my nipple... Damn it, I can't take this.”
Unable to bring herself to wake him, she carefully slipped one hand beneath the waistband of her sweatpants.
Her fingertips brushed against her privates, already dripping wet and burning with feverish heat. Circling her clitoris, she began to stroke herself as she usually did, her breath hitching sharply through her nose.
She stared down at Jeongseo's peaceful face.
Damn it... Why does he look so gorgeous when he's asleep?
People often threw around the phrase ‘sleeping like an angel.’
Right before her eyes lay the literal embodiment of those words.
“Nnngh! Haah...”
Using his sleeping visage as her visual fuel, Yeo-eun crashed into an intense orgasm in record time.
Yet the fire inside her refused to die down. His gentle hand still resting against her breast, the heat of their pressed bodies, and the faint, milky scent of his skin continuously stoked the furnace in her belly.
“Just... just once more.”
It was like throwing fresh timber onto a raging bonfire. Her swollen clitoris begged for more friction, and her fingers moved frantically against her slick folds.
“Wait... no, please...”
Just as she rode out a third shuddering wave of ecstasy, Jeongseo shifted in his sleep, his hand sliding off her chest and tumbling limply to the mattress.
Gulp.
Yeo-eun's gaze locked onto his slender fingers.
Cheeks flushed a violent red, she peeked up at his face to make sure he was still dead to the world, then slowly drew her drenched hand from between her legs.
“You can't hate me for this,” she whispered, her voice trembling. “You're the one who started it... Just once. Just this once.”
Her hand gently took hold of his limp, sleeping hand, guiding his slender fingers down beneath her waistband. Pressing his fingers over hers, she brought them firmly against her swollen, throbbing bud.
“Haaahn!”
A jolt of unimaginable pleasure tore through her core, making her arch her back against the sheets.
It wasn't merely the physical friction electrifying her groin. The staggering immorality of using her sleeping brother's hand to touch herself, combined with the intoxicating realization that this boy—the first male she had ever dared to desire—wasn't bound to her by blood at all, struck her like a violent thunderstorm.
“Hic! What is this... What's happening to me...? Ahhh!”
Once turned into twice, and twice spiraled into a third frantic rush. Overwhelmed by the suffocating heat, she kicked off her sweatpants and panties, tossing them carelessly to the floor.
Copious nectar gushed from her weeping slit, staining Jeongseo's mattress damp and warm.
“Jeongseo... Jeongseo...”
She whimpered his name under her breath, battling the primal urge to strip him bare and ravish every inch of his smooth skin. She clamped her teeth together until her jaw ached, fighting for control.
What if he wakes up and hates me forever?
That terrifying thought was the sole emergency brake holding back her bloodshot, fevered desire.
“Sniff... I have to hold it... Just hold it in.”
He had brought her to the brink of madness, only to abandon her to her own devices. Yet as successive orgasms drained the frenzied tension from her muscles, her boiling blood gradually cooled.
Thanks to that exhaustion, she managed to halt herself before crossing the final threshold.
So... I wasn't some kind of perverted freak after all.
Looking down at Jeongseo slumbering so peacefully, a profound, tender affection welled up inside her chest.
Like gentle rain seeping into parched soil, Jeongseo had begun soaking into the dry, cracked corners of her heart.
Outside the window, a steady patter began to drum against the glass, swelling into a gentle rush of rain.
The rain... sounds really nice.
Yeo-eun had lived a barren, lonely life, convinced that no man would ever love her or let her close.
Yet now, at long last, the endless winter had thawed.
A soft spring rain had begun to fall over her heart.