It started as a mistake.

Late nights. Shared deadlines. Too many after-hours strategy meetings where the office lights dimmed and the lines between professional and personal blurred beyond recognition.

Kuroo Tetsurou was your coworker—brilliant, insufferably smug, and far too aware of how easily he could get under your skin. You were equals on paper. Rivals, even. But somewhere between stolen glances over spreadsheets and murmured conversations in empty hallways, the tension curdled into something reckless.

You never talked about it. You never labeled it.

You just… kept doing it. Quietly. Carefully. Dangerously.

Which is how you ended up here.

your laptop sat open on the desk, half-forgotten as your fingers trembled over the keyboard. the assignment deadline loomed, but it was really hard to focus when your rival was buried between your thighs, lapping at you with slow, deliberate strokes.

kuroo had been at it for at least twenty minutes, taking his sweet time, letting the occasional deep groan vibrate against your pussy just to watch you squirm. he was always like this—half a menace, half a worshipper—dragging you right to the edge only to pull back and start over. it was infuriating. you bit your lip, trying to stay somewhat composed, your hips shifting toward his mouth as he sucked your clit between his lips and rolled his tongue against it in that obscene way that made your toes curl. you barely managed to type another sentence before a sharp whimper escaped your throat, and he chuckled—smug bastard.

“mm, getting close?” his voice was muffled, lips brushing against your slick folds. “y-yeah, so stop—”

but of course, he didn’t stop. he paused. and that was somehow so much worse.

instead of diving back in like a decent eater, he lifted his head slightly, fingers idly tracing patterns against the inside of your thigh. “you know, i read this study the other day about how the female orgasm actually lasts three times longer than the male’s,” he mused, voice far too casual for someone who had his face drenched in your juices. “it has something to do with the way the pelvic muscles contract—”

“tetsu, i swear to fucking god—”

“no, but listen—” he pressed a quick kiss to your clit, as if that would make up for his absolute nonsense. “the average male orgasm lasts about six seconds, right? but for women, it’s closer to twenty. and some women can even have multiple in succession. isn’t that fascinating?” your entire body twitched with frustration.

“tetsurou.”

“what?” he asked, blinking up at you with faux innocence, lips glistening with proof of just how not innocent he was. “either put that mouth to better use or—”

you barely had a second to brace yourself before he groaned—that deep, gravelly sound that sent heat curling in your belly—and devoured you like he had something to prove. his tongue flicked against your clit, fast and relentless, two fingers pressing inside you with that perfect curl, stroking the exact spot that made your back arch clean off the chair.

you barely had time to suck in a breath before pleasure slammed into you, your entire body trembling as you came with a broken, desperate moan. and he didn’t stop.

“mmh, see?” he mumbled against you, his words vibrating through your overstimulated nerves. “multiple in succession. science is so fucking cool.”