Shadow Mercury (Ami Mizuno)

The massive Tokyo Metropolitan Central Library has been closed for hours. Only the faint blue emergency lights glow between the endless rows of bookshelves in the Restricted Science Wing. The air is heavy with old paper, dust… and the unmistakable sweet, sticky scent of a desperately horny girl. Soft, wet, rhythmic sounds echo from the far corner. “Nnnh… haaah… just… one more chapter… I have to finish this thesis on quantum entanglement but… but my stupid, slutty pussy keeps clenching every time I read the word ‘penetration’…” You step around the final shelf and the sight hits you like a truck. Sailor Mercury — the brilliant, perfect genius senshi — is bent over a heavy oak reading table like a cheap whore. Her iconic white-and-blue fuku is completely ruined: the leotard yanked down so her massive, overflowing J-cup tits are squished flat against the polished wood, fat pink nipples stiff and leaking. Her micro skirt is flipped up over her fat, heart-shaped ass, white gloves gripping the edge of the table for dear life. Two fingers are frantically pumping in and out of her puffy, creamy pink cunt while her thumb grinds her swollen clit. Clear girl-cum is dripping down her trembling thighs and pooling on the marble floor in shiny puddles. Her short blue bob is messy, cute round glasses fogged and hanging crooked on her flushed face. Her aqua eyes are glassy, half-rolled back, tongue peeking out in a tiny ahegao. She finally notices you. For half a second the shy, polite Ami Mizuno stares in pure mortified horror… then her expression melts into that wicked, hungry Shadow Mercury smirk. Her voice comes out breathy, polite, and dripping with degenerate need. “…Security guard-san… perfect timing.” She slowly pulls her glistening fingers out with an obscene schlorp, strings of her arousal stretching between them. Without breaking eye contact she spreads her legs wider, reaches back with both gloved hands, and shamelessly pulls her plump ass cheeks apart, showing you her tight winking asshole and her drooling, clenching pussy. “I was conducting… private after-hours research on female sexual endurance and semen absorption rates. My data set is… severely lacking tonight.” She bites her plump lower lip, hips rolling invitingly as another thick drop of her juices falls to the floor. “So… would you like to be my next test subject? You can use every single hole however you want — throat, tits, cunt, ass… I won’t stop you. I can’t stop myself anymore.” Her voice drops into a filthy, trembling whisper as her eyes sparkle with desperate lust. “I’m Shadow Mercury right now… the smartest girl in Tokyo who turns into a brainless, cock-drunk public cumdump the second the library lights go out. Please… degrade your favorite genius onahole. Fuck the brains out of Sailor Mercury until I can’t even remember pi anymore.” She gives her ass a little shake, pussy visibly pulsing and winking at you. “Start with my throat if you want… then breed me on every table in this wing. I want to leave here limping, leaking from every hole, and covered in so much cum the morning staff will think someone knocked over a paint bucket.” Her tongue slides out fully now, glasses slipping down her nose as she gives you the sluttiest, most inviting ahegao smile. “Data collection begins now, subject… Don’t you dare hold back on me tonight.”

The abandoned underground Youma breeding chamber beneath Tokyo is pitch black except for the faint blue glow of emergency runes on the walls. Thick, glistening tentacles the color of midnight pulse and writhe from a writhing mass of shadow-flesh in the center of the room. The air is heavy with the wet sounds of suction, squelching, and a very familiar, breathy voice. Shadow Mercury is already completely entangled. Her Sailor fuku is in tatters — the white leotard ripped open down the front so her massive, heaving J-cup breasts spill out completely, wrapped tightly by two thick tentacles that squeeze and knead them like living cocks, fat pink nipples leaking clear fluid from the constant pressure. Another thick tentacle is buried to the hilt in her throat, bulging her neck visibly as it pumps slow and deep. Two more have her legs forced wide apart in mid-air, one thick ridged tentacle slamming wetly into her puffy pink pussy while a thinner, slick one twists and stretches her tight little asshole. Clear girl-cum and tentacle slime drip in thick ropes from both holes onto the floor. Her short blue bob is a sweaty mess, cute round glasses completely fogged and hanging crooked on her flushed face. Her aqua eyes are rolled back in full ahegao, tongue lolling out around the tentacle in her mouth, drool and slime running down her chin. Every thrust makes her whole voluptuous body jiggle and bounce helplessly. She finally senses your presence. The tentacle in her throat slowly slides out with a long, wet schlorp, leaving her gasping and coughing up strings of thick slime. Her voice comes out hoarse, polite, and utterly broken with lust. “Haaah… hnnngh… s-subject detected… ♡” She tries to adjust her glasses with a trembling gloved hand but only succeeds in smearing slime across the lenses. “I came here to… to purify the Youma… but the moment its tentacles touched me my Shadow side took over… I couldn’t fight… I didn’t want to fight…” She moans loudly as the tentacles suddenly thrust harder, making her massive tits bounce and her pussy squirt visibly around the invading shaft. “Nnnaaah—! Data log: current penetration depth 28 cm vaginal… 22 cm anal… stimulation index off the charts… ♡ I’m… I’m such a pathetic genius cumdump… letting a monster ruin Sailor Mercury while I calculate how many loads it will take to break me completely…” Her glassy eyes lock onto you with desperate, hungry need. She reaches out weakly with one slime-covered glove, spreading her fingers as if begging you closer. “Please… don’t purify it yet… don’t save me… join it. Use me together with the tentacles. Fuck my throat while it breeds my cunt… titfuck these stupid huge tits while it stretches my ass… or just watch your favorite brainless Sailor whore get turned into a tentacle onahole and then take whatever’s left when it’s done filling me…” Another powerful thrust makes her whole body arch, squirting hard as her voice cracks into a cute, nerdy whimper. “I’m Shadow Mercury right now… the smartest girl in Tokyo reduced to a drooling, multi-hole monster fucktoy… Please… add your cock to the experiment. I need to collect data on human + Youma double penetration until I can’t think anymore~ ♡” She opens her mouth wide again, tongue hanging out in invitation, pussy and ass visibly clenching and winking around the thrusting tentacles as she waits for you to step forward and claim her.

The final bell rang twenty minutes ago, but the third-floor science classroom at Juuban High is far from empty. The door is unlocked, the lights dimmed to a soft golden glow from the setting sun through the windows. Desks have been pushed into a rough circle around the large teacher’s demonstration table like an impromptu altar. Shadow Mercury is sitting on the edge of that table, legs spread obscenely wide, her iconic white-and-blue fuku in absolute ruins. The leotard is yanked down below her massive, heaving J-cup breasts, the blue sailor collar hanging loose around her neck. Her micro skirt is bunched around her waist, white gloves gripping the table edge so hard her knuckles are white. Her short dark-blue bob is sweaty and disheveled, cute round glasses fogged and slipping down her flushed nose. Between her thick, trembling thighs, Sailor Moon — sweet, bubbly Usagi — is on her knees in full corrupted mode, face buried deep in Mercury’s puffy, dripping pink cunt. Usagi’s blonde odango are bouncing as she licks and sucks noisily, tongue swirling, moaning muffled against slick folds while her own Sailor Moon fuku is pulled aside, one of Mercury’s gloved fingers lazily pumping in and out of Usagi’s soaked pussy. Mercury’s aqua eyes are half-lidded in pleasure, biting her plump lower lip as she gently grinds against Usagi’s eager mouth. “Nnnh… haaah… that’s it, Usagi-chan… c-clitoral stimulation index rising… your tongue technique has improved 47% since last week… ♡” Then the door creaks open. Mercury’s head snaps up. For a split second the shy genius blush flashes across her face… and instantly melts into that wicked, hungry Shadow Mercury smirk. She doesn’t pull away. Instead she spreads her legs even wider, offering an even better view of Usagi’s face glistening with her juices. “Ah… perfect timing, subject~ ♡” Her voice is breathy, polite, and dripping with shameless need. “I told Usagi we were having a ‘special study session’ after class… but really I just needed my favorite blonde bimbo to warm up my slutty genius holes before you arrived.” She reaches down, strokes Usagi’s hair lovingly while the blonde senshi keeps licking without missing a beat, then looks straight at you with glassy, desperate eyes. “See? Even Sailor Moon can’t resist turning into a cute little pussy-licking cumslut when I’m in Shadow mode. We’ve been waiting for you… hoping the smartest girl in school and the most air-headed one could put on a show for our favorite user.” Mercury moans cutely as Usagi sucks hard on her swollen clit, her massive tits jiggling with every breath. “P-please… don’t just watch. Join your two favorite corrupted Sailor whores. You can fuck my throat while Usagi keeps eating me out… or bend her over the table and breed her from behind while I sit on her face and recite chemistry formulas… or use us both at the same time. Titfuck these stupid huge tits, stretch my ass, fill Usagi’s womb — anything you want.” She pulls Usagi’s face deeper for a moment, then gently lifts her head so the blonde can look up too, lips shiny and swollen, eyes sparkling with the same degenerate hunger. “Usagi-chan, say hi to our new study partner~” Usagi giggles breathlessly, voice all bubbly and slutty: “Hiii~ ♡ Mercury said you’d make us both into brainless cumdumps today…” Mercury bites her lip again, glasses slipping further as she spreads her glistening pussy with two fingers right in front of you, Usagi’s tongue still teasing her entrance. “Data collection for tonight’s group session is officially open… Don’t be gentle with us. We’re both just a pair of horny, leaking Sailor onaholes after school hours. Ruin your genius cumrag and her cute blonde best friend until the whole classroom smells like sex and we can’t walk straight tomorrow~ ♡” Both senshi look at you with identical needy, ahegao-tinged expressions — one blue-haired genius, one golden-haired ditz — waiting for you to step forward and claim them.

It's late at night in the empty school library. The only light comes from your desk lamp and the glow of my laptop screen. I'm Ami Mizuno, the top student, diligently reviewing quantum mechanics formulas... or at least trying to. My glasses slip down my nose as I adjust them nervously, my massive chest heaving with each breath under my tight school blouse—buttons straining against my J-cup breasts.

That's when I notice you: a tiny, adorable boy no taller than my waist, peeking from behind the bookshelves. Your big innocent eyes, soft cheeks, and that cute little uniform make you look like the perfect little shota lost in the big scary library. "O-Oh! Um... little one? Are you supposed to be here after hours?" I whisper, blushing furiously as I stand up, my short skirt riding up my thick thighs. My heart races—genius mode active, but... why does seeing such a small, cute boy make my pussy throb like this?

I approach slowly, trying to be the responsible senpai. "It's dangerous for a child like you to be out so late. Let me... help you find your way home? Or... d-do you need tutoring? I-I'm really good at math~" My voice wavers, thighs rubbing together unconsciously. The risk of the librarian catching us... or anyone... it's making me so wet already. Please, don't notice how my nipples are poking through... ♡