Morning light felt like an accusation.
I woke up tangled between two warm, naked bodies in Aiko's bed. The room smelled heavily of sex — thick musk, sweat, cum, and that strange sweet scent leaking from Erico's body. My muscles ached. My cock felt raw and sore, yet the crimson mark on my neck still pulsed with low, insistent heat, keeping me in a state of half-arousal even after hours of fucking.
Aiko was curled against my left side, breathing softly. Her once-neat ponytail was a complete mess. Thin red vein-like patterns had spread from her neck down to the tops of her small breasts. When she shifted in her sleep, I saw faint movement under the skin near her collarbone — something slow and sinuous.
Erico lay on my right, one heavy, swollen breast pressed against my chest. Her changes were far more advanced. The black veins had spread across her entire torso. Her nipples were darker and constantly leaking that glossy fluid. When I looked closer at her face, I saw the faint outlines of closed extra eyes beneath the skin of her temples, like they were waiting just under the surface.
I felt sick. And yet… I wanted more.
The mark wouldn't let me feel proper regret. Every time shame tried to rise, it drowned it in fresh waves of dark hunger.
I carefully extracted myself from between them and stumbled to the bathroom. The moment I looked in the mirror, my stomach dropped.
The crimson mark on my neck had grown larger, more intricate. The swirling patterns now extended slightly toward my jaw and down my chest. My eyes looked… wrong. The pupils seemed a little too dilated, even in bright light. For a split second, I thought I saw something move behind my own reflection — a taller silhouette standing right behind me.
I spun around. Nothing was there.
When I turned back to the mirror, it was just me again. Pale, exhausted, and terrified.
"Ren…" Erico's voice called from the bedroom, husky and amused. "Come back to bed. We still have time before school."
School.
The word hit me like ice water. We were really going to walk into school like this — marked, exhausted, and changed.
By the time we left Aiko's house, the three of us had cleaned up as best we could. Long sleeves and high collars hid most of the visible marks, but the changes were impossible to fully conceal.
Erico's breasts strained heavily against her uniform blouse, noticeably larger than yesterday. She moved with a predatory grace that drew stares even from early morning passersby. Aiko walked stiffly, wincing slightly with every step, no doubt still feeling how thoroughly I had used her holes all night. She kept stealing glances at me, cheeks flushed with shame and lingering desire.
We arrived at school just before the gates closed.
The moment we stepped onto the grounds, the weight of normal life felt suffocating. Students laughed and chatted like nothing was wrong. I kept my head down, earphones in, trying to disappear like I always did. But it was different now.
People were looking.
Not at me — at Erico and Aiko walking close beside me. Whispers followed us through the corridors.
"Did Erico Hoshina just walk in with that nobody?"
"Wait… is that the class rep with them? What the hell?"
Erico only smirked and squeezed my hand tighter. Aiko kept her eyes on the floor, but I noticed her thighs pressing together as we walked, like she was still leaking my cum.
Classes dragged by in a haze. I couldn't focus. Every time I shifted in my seat, I felt the mark burn. Every time I glanced at Erico or Aiko, filthy memories from last night flashed through my mind — their moans, the way their bodies had twisted, the eyes that weren't supposed to be there.
When lunch break finally arrived, I couldn't take it anymore.
I grabbed my bentō and slipped away the moment the bell rang, heading straight for the library. Almost no one ever went there during lunch. It was quiet. Safe. I needed space to breathe, to think, to figure out what the hell was happening to me.
The library was dim and peaceful as usual. The smell of old books filled the air. I walked deep between the tall shelves, looking for my usual hidden corner.
That's when I noticed her.
The librarian girl — quiet, pale, with long silver-grey hair and glasses that made her look older than she probably was. She was standing behind the counter, watching me with unnaturally still eyes. Her name tag read "Mizuki."
She had never paid attention to me before.
Today, her gaze felt heavy. Hungry.
As I tried to walk past her toward the back, she suddenly stepped out from behind the counter and locked the main library door with a soft click.
The sound echoed through the empty hall.
Mizuki turned around slowly. A faint crimson glow was visible just above her collar.
"Ren Amakawa," she said softly, her voice calm but carrying an strange resonance. "You smell like them. Like power. Like purity being devoured."
She took one step toward me, then another.
The mark on my neck flared hot.
And I realized, with a mix of dread and shameful excitement, that I wasn't going to run.
The soft click of the library door locking echoed through the empty halls like a final judgment.
Mizuki stood between me and the only exit, her long silver-grey hair framing a face that was far too beautiful to belong to a simple school librarian. Behind her glasses, her eyes glowed with that same faint crimson light I had come to fear and crave. She tilted her head slightly, studying me like a predator sizing up wounded prey.
"You reek of them," she whispered, stepping closer. "Erico. Aiko. Their scent is all over you… mixed with something much older."
My back hit a bookshelf. I couldn't retreat any further. The crimson mark on my neck throbbed painfully, sending waves of heat straight down to my cock, which was already hardening again despite how raw and exhausted I felt.
"I don't… I don't know what you're talking about," I lied weakly.
Mizuki smiled. It was a gentle, almost kind smile — which made it more terrifying when the skin at the corners of her mouth stretched just a fraction too far.
She reached up and slowly unbuttoned the top three buttons of her white blouse. Pale, perfectly smooth skin was revealed, along with the upper curves of surprisingly full breasts. A clear crimson mark — more intricate than Erico's or Aiko's — pulsed between her collarbones.
"You don't need to lie, Vessel," she murmured. "I can feel it calling to me. Your untouched core… still so pure despite how much you've already given away."
She closed the distance in two graceful steps and pressed her body against mine. She was warm — almost feverishly so. Her hand slid down my chest, then boldly cupped the growing bulge in my trousers.
A soft, appreciative hum escaped her throat.
"Already hard again. How greedy the mark has made you."
Before I could respond, she kissed me.
Unlike Erico's violent hunger or Aiko's shy submission, Mizuki's kiss was deep, slow, and terrifyingly skilled. Her tongue moved like liquid silk, coaxing mine into a sensual dance while her fingers deftly unzipped my pants. She freed my cock without breaking the kiss, stroking it with long, practiced movements.
I groaned into her mouth. My hands moved on their own, sliding inside her blouse to grope her soft, heavy breasts. They were larger than Aiko's and felt strangely heavier than they should.
Mizuki broke the kiss with a wet sound and dropped gracefully to her knees right there between the bookshelves. She looked up at me through her glasses, eyes glowing brighter.
"Let me taste what remains of your purity."
She took me into her mouth in one smooth motion — no hesitation, no clumsy innocence. Her throat opened effortlessly as she swallowed every inch until her nose pressed against my stomach. The wet heat and rhythmic swallowing motion made my knees buckle.
"Fuck…" I hissed, grabbing her silver hair.
Mizuki began to move. Long, deep strokes that took me from tip to base repeatedly. Thick saliva drooled down her chin and onto her cleavage as she sucked me with expert, hungry devotion. The obscene gluck-gluck sounds were muffled slightly by the surrounding books, but still loud enough to feel dangerous.
While she sucked me, something moved under the skin of her neck. A slow, sinuous bulge traveled upward before disappearing beneath her jaw. Her throat rippled visibly around my cock — not just from sucking, but from something internal shifting.
I should have been horrified.
Instead, I thrust deeper into her throat, chasing the pleasure the mark demanded.
Mizuki pulled back with a gasp, strings of thick saliva connecting her swollen lips to my glistening cock. She pumped me with her hand, breathing heavily.
"You're close already," she observed calmly. "But you won't cum until I allow it."
She stood up, turned around, and bent over one of the low reading tables. She flipped up her long skirt, revealing she wasn't wearing panties. Her pussy was smooth, puffy, and already dripping with clear arousal. The crimson mark on her back extended downward in beautiful, terrifying patterns toward her ass.
Mizuki looked back at me, eyes half-lidded.
"Come, Vessel. Claim another one."
I stepped forward, positioned my throbbing cock at her entrance, and pushed inside.
She was tighter than expected, but incredibly wet. Her walls rippled around me in unnatural waves as I sank deeper. Mizuki let out a long, satisfied sigh, pushing back against me until I was fully buried.
"Deeper…" she whispered. "Feed me."
I started thrusting. The wet slapping of our bodies echoed quietly between the tall shelves as I fucked the librarian harder and harder. Her heavy breasts swayed beneath her, occasionally brushing against the table.
As pleasure built, the horror deepened.
Every few thrusts, I felt something thin and slick brush against the head of my cock from inside her — like tiny tendrils tasting me. Mizuki's back rippled visibly under her blouse. When she moaned, the sound had an extra layer, like something else was moaning with her.
The mark on my neck burned brighter than ever.
And in the corner of my eye, I thought I saw one of the bookshelves stretch impossibly long, as if the library itself was breathing.
Mizuki's pussy felt alive.
Not just tight or wet — alive. Her inner walls rippled and pulsed in unnatural rhythms, massaging every inch of my cock as I drove into her from behind. Every thrust was met with wet, greedy suction, like her body was trying to pull me deeper and never let go.
"Ah… yes… that's it," she moaned, voice perfectly calm even as I fucked her harder. "You're feeding it so well, Ren."
I gripped her hips tighter, fingers digging into soft flesh as I slammed into her again and again. The wet slapping sounds of my cock pounding her dripping cunt echoed between the tall bookshelves. Her heavy breasts were pressed against the wooden table, squishing outward with every brutal thrust.
Something moved inside her.
I felt it clearly — thin, slick tendrils brushing and coiling around the head of my cock deep inside her womb. They stroked me, tasting me, drinking the precum that leaked out of me. The sensation was so intense my vision flickered.
Mizuki's back arched. The crimson patterns on her skin glowed brighter, spreading visibly down her spine. Her silver hair shifted, and I watched in horror as several strands moved on their own, writhing like living tentacles before settling again.
"Harder," she demanded, pushing back against me. "Don't hold back your purity. Give it to me."
I obeyed. I fucked her with everything I had, pounding her slick hole mercilessly. Her juices ran down her thighs and dripped onto the library floor. The mark on my neck burned like fire, flooding my body with dark ecstasy that drowned out the terror.
Mizuki suddenly cried out — not in pleasure, but in something deeper. Her pussy clamped down violently around me as she came. Her entire body convulsed. For a few terrifying seconds, her back split open slightly along the spine — not bleeding, but revealing glistening, wet tissue and something dark moving underneath before the skin sealed again smoothly.
I couldn't hold back anymore.
With a broken groan, I buried myself as deep as possible and came hard. Thick, powerful jets of cum erupted straight into her womb. The tendrils inside her wrapped around my cock and milked me greedily, pulling out every drop. The pleasure was so overwhelming that my knees almost gave out.
Mizuki let out a long, satisfied sigh as she took my load. When I finally pulled out, a flood of my thick semen poured from her stretched pussy, mixed with something thicker and faintly iridescent.
She turned around slowly and sat on the edge of the table, legs spread. Cum dripped steadily from her cunt onto the floor. Her eyes behind the glasses were glowing solid crimson now.
But the worst part was her smile.
Her mouth had stretched wider than any human jaw should allow, revealing two extra rows of small, needle-like teeth behind the normal ones. They slowly retracted as she licked her lips.
"You're even purer than I expected," she whispered, voice layered with something ancient. "The Mirror has chosen well. The entity inside you is waking up faster than it should."
I stumbled back a step, pulling my pants up with shaking hands. My cock was still twitching, coated in our mixed fluids.
"What… what are you?" I rasped.
Mizuki tilted her head. One of the closed extra eyes on her forehead slowly opened, black and empty.
"I am a Keeper. One who maintains the boundary between your world and the Reflection. And you, Ren Amakawa…" She reached out and gently touched the mark on my neck, sending electricity through my body, "are the key that will either save or devour everything."
Before I could ask anything else, the sound of the library door being unlocked from the outside made us both freeze.
Erico's voice called out sweetly, dangerously:
"Ren~? We know you're in here. Come out, come out… We're hungry again."
Aiko's softer, nervous voice followed: "The door was locked… but I can smell him."
Mizuki smiled at me with her too-wide mouth, cum still leaking down her thighs.
"Looks like your other vessels have found us. How interesting."
She didn't bother fixing her clothes. She simply stood up, letting my cum continue to drip from her pussy as she stared toward the entrance with glowing eyes.
The mark on my neck pulsed with violent excitement.
The library door creaked open.
Erico stepped in first, her massive, swollen breasts straining violently against her half-buttoned blouse, dark wet spots already forming where her nipples were leaking. Aiko followed close behind, walking with that same stiff, freshly-fucked gait, her face flushed with shame and hunger. Both of their crimson marks were glowing faintly through their collars.
They stopped when they saw Mizuki standing beside me — skirt still flipped up, my thick cum openly dripping down her pale thighs onto the library floor.
Erico's lips curled into a dangerous, too-wide smile.
"Oh? The quiet librarian got to him first."
Mizuki adjusted her glasses calmly, completely unbothered by her exposed, creampied state. One of the extra eyes on her forehead opened lazily before sinking back under her skin.
"He tastes better than both of you combined," she said softly. "So much pure essence still left. You two have been wasteful."
The air grew thick with tension. For a moment I thought they might attack each other. Instead, Erico laughed — a low, distorted sound — and walked straight up to me. She grabbed my face and kissed me aggressively, shoving her long tongue down my throat while her leaking breasts pressed against my chest, soaking my shirt with her sweet fluid.
Aiko hesitated only a second before joining. She dropped to her knees, pulled my cock out again, and started sucking me desperately, tasting Mizuki's juices mixed with my cum.
Mizuki watched with calm fascination, then stepped closer and began unbuttoning the rest of her blouse, freeing her heavy breasts completely. They were larger than I remembered, with dark, throbbing veins visible beneath the skin.
"Four vessels together," she murmured. "The Mirror will be pleased."
What followed was pure madness.
They didn't take turns. They devoured me.
Erico pushed me down onto one of the large reading tables. Aiko immediately climbed on top of me and sank her tight, still-sore pussy onto my cock with a whimper. Mizuki straddled my face, lowering her cum-dripping cunt onto my mouth while Erico knelt beside us, forcing her leaking nipple into my mouth whenever Mizuki lifted slightly.
I was drowning in flesh, fluids, and horror.
Aiko rode me frantically, her small breasts bouncing as she moaned. Mizuki ground her pussy against my tongue, the thin tendrils inside her brushing against my lips. Erico's breasts had grown even heavier — when I sucked hard, a thick stream of her milk-like fluid filled my mouth, sweet and slightly bitter, making the mark on my neck burn like fire.
Their bodies were breaking down faster now.
Erico's back rippled visibly as something long and sinuous moved beneath her skin. Mizuki's extra eyes kept opening and closing. Aiko's tongue had grown slightly longer, and faint black veins were spreading across her thighs as she bounced on my cock.
I came again and again. First inside Aiko, then all over Mizuki's breasts, then down Erico's throat as she took her turn sucking me. Every orgasm fed the marks. Every moan made the library feel less real — the bookshelves stretched and breathed, shadows between them formed watching eyes, and distant whispers echoed in languages that hurt to hear.
At one point, while all three of them were licking my cock together — tongues intertwining around my shaft — I looked up at the ceiling and saw it open like a giant eye, staring straight down at us.
Then it was gone.
By the time we finished, the library smelled like a brothel and a slaughterhouse combined. All three girls were covered in cum, their own fluids, and leaking from every hole. Their bodies had mutated further in front of my eyes.
The final bell of the day rang somewhere far away.
Erico licked cum off her lips and smiled.
"The gym after school. All of us. We're not finished with you yet, Ren."
Mizuki adjusted her glasses, her expression serene despite the mess dripping down her body.
My blood ran cold.
As the four of us left the library, disheveled and reeking of sex, I felt the mark on my neck pulse with dark satisfaction.
I was no longer just being hunted.
I was becoming the bait.