Chapter 1 — Unusual Constitution

People say you know your own body better than anyone else. I always believed that—thought it meant no one could feel your pain or sense your illness quite like you. And I agreed… until I realized there was something inside me I didn’t understand. It took me a long time to notice it. It started the day after my twenty-first birthday.

“Kim Hyun-young. Do you trust me?”

He asked me in a trembling voice.

I wanted to trust him. But I already knew what lay beneath his words, so I just nodded silently. That day, I wasn’t feeling well—I’d been fighting off a cold, dragging my feverish body here against all reason. Tomorrow, he would leave for two and a half years…

And he truly wanted me to wait. Or at least, I wanted to believe he did. I had dreamed of giving my purity to him on our honeymoon. But now… I loved him, so I wanted to give him my body. To reassure him. No—to reassure myself.

Even when he led me by the hand into the love motel room, we were awkward. He said it was his first time too. We sat stiffly on the bed, flipping through TV channels, filling the silence with forced words. Meaningless voices from the screen drifted past us like smoke. Then, as if steeling himself, he moved closer.

“Honey… can I kiss you?”

I answered with silence—a silent yes. In that instant, his lips touched mine. I closed my eyes as his face drew near, waiting for the warmth of his mouth. A soft heat passed from his lips to mine.

He pulled me into his arms. I surrendered my body to him. Wherever his hands roamed, fire flared and waves crashed. The moment his fingers slipped under my clothes and brushed my skin, burning heat erupted across my flesh.

“Honey… your breasts… they’re so beautiful…”

He swallowed hard, staring at me. Then he yanked off my skirt and began frantically undressing.

He stood before me, revealing his thick, erect cock. A strange fire ignited deep inside me. He carefully peeled off my panties and gazed at my pussy, breath catching.

“So beautiful…”

I turned my face in shame—but my legs didn’t close. Instead, I spread them wider, offering myself to him.

His face neared my most private place. He sniffed deeply, then pressed his sweet tongue against me. At the first flick, a searing pleasure shot up my throat.

His tongue devoured me greedily, making lewd, wet sounds. My body responded instinctively, drenching his mouth with slickness. My body naturally craved his tongue, his cock—everything.

He wanted me to touch him. I reached for his cock. My cold fingers met his burning shaft. I felt the pulsing veins twitch beneath my palm, the fierce heat radiating into my hand. Without hesitation, I brought his cock to my mouth and sucked.

He slowly laid me down, climbing over me, rubbing his cock against my entrance.

“Ahh… honey…”

In that moment, I saw pure animal desire in his eyes. Fear gripped me. My body trembled. Then came the sharp, tearing pain—

“Ahh—!”

He pushed harder, forcing his way inside. I felt my insides split, ripped apart.

“It hurts… honey… it hurts!”

Despite my tearful cries, he kept thrusting, driving his cock deeper into my pussy.

“Does it hurt a lot? Just a little longer… it’ll get better.”

He tried to soothe me, but my core burned like fire. Once fully buried inside me, he began moving slowly.

My screams coiled inside my throat, trapped.

He slammed into me faster, harder. My sobs drowned beneath his ragged breaths. Then, with a final groan, he emptied himself inside me and collapsed atop my body.

It took a long while before he finally pulled out, staring at my blood-soaked pussy.

“You really… were a virgin…”

I nodded weakly, tears dried on my cheeks.

He led me to the bathroom, washing me gently, trying to erase the painful marks of my first time. But as he cleaned me, he shoved his cock back into my still-raw pussy. In the shower, I swallowed another round of painful tears—for him.

The next day… he enlisted.

But something strange happened right after. By the following week, I’d been suffering from a full-body chill and aches from my lingering cold—but the day after sleeping with him, it vanished. Completely. Like magic.

At the time, I didn’t think much of it. The emptiness from his departure, the ache of losing my virginity—it all overshadowed anything else.

Four months later, one of his classmates began relentlessly pursuing me. Ever since my boyfriend enlisted, this guy sent me flowers, movie tickets—trying to win me over.

At first, he claimed he was looking out for me on behalf of his friend. But soon, I realized the truth—he wanted me.

I rejected him many times, thinking of my man in the military. But as days passed with not even a single letter from him, resentment grew. Loneliness and sorrow overwhelmed me. Slowly, my heart began to open.

One night, we ended up drinking together.

I drank far more than usual. Drunk and unsteady, I leaned against his back as he carried me out of the bar. I wore a skirt, and he struggled slightly to keep me balanced.

His warm, sweaty scent filled my nose. His hands rested on my sensitive hips. I could feel my breasts pressed against his broad, firm back—and his heartbeat, racing just as fast as mine.

Drunken and slurring, I whispered into his ear.

“James… do you like me? Hmm?”

He didn’t answer. His silence made me uneasy.

“Put me down. I’ll go home myself.”

I shook him.

“You’re too drunk. Let me call a taxi.”

“I can walk alone… I can…”

I kept swaying and tugging at him until we reached the road in front of campus. There, he gently lowered me from his back. I staggered forward a step, then collapsed.

He caught me under the arms, holding me upright.

“Tell me… James. Are you really doing all this with no ulterior motive? Or is it…?”

I stared at him with hazy eyes. His figure blurred before me, but I stood straight, clinging to the last of my strength.

“Emma…”

“James… tell me…”

I waited.

Deep down, I think I was searching for an excuse to let go of the man who never wrote. If this man confessed…

His hand rose to my face. He caressed my cheek softly.

“I love you. Not as your senior… but as a man.”

Hearing those words, a strange sensation stirred inside me. This was exactly what I’d wanted—the excuse to abandon the man in uniform.

I threw myself into his arms.

“I’m so drunk…”

I murmured as I clung to him. And without another word, we walked to a nearby love motel.

He carried me like a princess into the room. The moment the door shut, he pounced like a beast.

“Ahh, James… stop, don’t—”

But his tongue was already sucking my clit, his fingers plunging deep.

The dormant lust inside me—only awakened once before—exploded into flame. His tongue expertly circled my swollen clitoris while his fingers twisted inside my soaking pussy. So skillfully… as if he’d known my body forever.

“James… put it in… please… now… ah…”

He shoved me roughly. With my skirt hiked up, still licking me, he tore my blouse open and yanked my skirt down.

A snap—fabric ripping. My skirt fell away, discarded beyond the bed.

His cock—slightly curved like an S—pressed against my entrance. Then, smoothly, effortlessly, it slid deep inside.

“Ahhh…”

I arched my back.

I felt him fill me completely. His passionate rhythm set my entire body ablaze.

“Hah… James… ah…!”

His cock seemed to know every hidden spot inside me, scraping each one perfectly. Like a machine, tireless, pounding my pussy again and again. And then, his movements grew wilder—

“Ugh… hah… hah…!”

He exploded deep inside me, flooding my core with his seed.

The next morning, after parting ways, I returned home.

Mom scolded me furiously. She grabbed me, slapped my buttocks and back. I was punished until she finally let go. Of course, my curfew tightened. Outdoor access was cut short—from 10 PM to 8 PM.

Until then, I hadn’t connected the two incidents. How could I? It took time to realize the truth. While dating James, I slept with him repeatedly. And with each time, I noticed changes. The fire within me grew stronger. I became bolder, hungrier during sex.

I discovered I loved oral—so much that I’d suck him for thirty minutes straight. When his cock thrust into me, instead of passively enduring, I clenched my pussy around him like I wanted to crush it. I begged him to try positions I’d never dared before—69, woman-on-top—pleading to try them first.

Now, when he came in my mouth, I bit down on his cock, swallowing every drop as his cum slid down my throat. The sensation left me dizzy, euphoric—on the verge of passing out.

But it wasn’t just my desires that changed. At first, I didn’t notice. But after several times with him, my bra size shifted. My A-cup breasts had grown steadily—now even B-cups felt tight. My skin shimmered with a new, radiant glow.

And every morning after sleeping with him, my body felt light. Weightless. Healthy.

Yes. Every time I took his seed, my body transformed—into someone new, someone different from before.

At first, during fertile days, I insisted he use condoms. But strangely, on those days, nothing changed in me. No transformation. So after a while, I stopped asking. And during ovulation, I simply avoided sex.

Once, I couldn’t hold back—we had sex during my period. The next day, my lifelong, agonizing menstrual cramps disappeared. Forever.

But our relationship didn’t last a year. As I began demanding sex every time we met, he grew wary of my obsession. When other men started approaching me, drawn by my changing allure, I dumped him without hesitation.

Instead, I chose Alex—a hockey player from another department. A strong, virile man who could flood my body with fresh, potent seed.

Alex was exactly as I imagined: handsome, powerful, built like a stallion. His cum carried the rich, heady scent of night-blooming flowers, and he released more than any man before. After sex with him, my body improved even more.

“Emma… you’re getting more beautiful. Even prettier than when I first saw you.”

“You must be feeding my body good nutrients. Hehe…