Clever girl
Katsuki Bakugo x Fem! Reader
TW/CW: 18+, smut, p in v, creampie, dumbification, bimbo! reader technically not really bc she smart, older! bf! Katsuki, established relationship, early relationshipâstill finding things out about each other, manhandling, fingering, petnames, condescension (?), longggg intro sorry
A/N: grad gift to myself i guess⌠dumbification make me go brrrrr. I must remind everyone that YES bakugo smart, but he did not go to university
With dinner finished, the rest of the evening fell into a familiar rhythm. The television played some late-night programme Katsuki had inevitably become invested in, though you couldnât have said what it was about. Tonight was your study night, which meant your textbook captured your attention while you occupied his lap instead of the cushion beside him.
It was a common arrangement the two of you had settled into over the past couple of months without ever really discussing it. You studied. He watched television. Somewhere along the way, one of his hands always found your thighs.
Only tonight, his attention drifts from the screen. His eyes catch the pages spread open across your lap; paragraphs packed with diagrams, strange bold terminology, and long strips of letters that looked more like a cypher than writing.
He frowns at the pages; come to think of it, he had absolutely no idea what you were studying, not even a little. His thumb traces absent circles against your skin as he rests his chin lightly on your shoulder.
âSo,â he murmurs, voice warm with curiosity, âwhatâre you actually studying, sweetheart?â
âOh! Genetics.â You brighten immediately, clearly passionate.
Tilting the textbook towards him, you proudly show off the page. Dense paragraphs. Colourful chromosome diagrams. Words that made his eyes glaze over before heâd even finished reading the first sentence.
Katsuki stares. âGenetics?â
âMhm.â You nod happily.
âItâs one of my modules this semester. At the moment Iâve got genetics, bioinformatics and genomics,â You pause, counting on your fingers. âand soil ecology.â
Katsuki responds with silence for a moment, blinking once, then twice. You wait patiently.
âYou lost me after genetics.â
A quiet laugh escapes you. âI know.â
âNo, seriously.â
He glances back down at the textbook as though it might suddenly become more comprehensible.
âWhat the hellâs bio⌠bioinfoâŚâ
âBioinformatics.â
âThat.â
âItâs using computers to analyse biological data.â
âRight.â
He nods with complete confidence. He understood absolutely none of that.
âYou know,â he admits after a moment, âI just realised Iâve never actually asked what youâre studying.â
âI never really talked about it.â
âI kinda just,â He scratches the back of his neck sheepishly. âfigured university was where you disappeared to during the day while Iâm at work.â
âIt kinda is.â You giggle.
Another silence settles between you. His eyes wander back to the textbook. Then to you. Then back again.
âYouâre really studying all this?â
âMhm.â
âAnd you understand it?â
You look at him with complete innocence. âYeah?â
It was the confusion in your expression that finally made it click. You werenât pretending. This wasnât difficult for you; it was normal. Katsuki felt like someone had quietly rewritten everything heâd assumed. His girlfriendâwho collected plushies, wore everything in shades of pink, talked to animals like they were people and had meltdowns over getting her outfit just rightâwas frighteningly intelligent.
âYouâre scary.â
âI am?â You ask with a little frown.
âA little.â
âI donât think genetics is scary.â
âNo, sweetheart.â
He laughs, wrapping his arms a little tighter around your waist. âI mean you.â
âI thought you were just,â He hesitatingly continues, âCute?â
âCanât I be cute and smart?â
He laughs again, âYeah.â
You smile, pleased with yourself, âMmh.â
After another comfortable silence, you add almost absent-mindedly, âIâm one of the highest-performing students in biosciences at Musutafu Central.â
Katsuki's hand tracing your thigh froze. âCome again?â
You look back at him. âIâm one of the highest-performing students.â
âAt Musutafu Central?â
âMhm.â
He stares at you for several seconds.
âAngel.â
âYeah?â
âThatâs one of the best universities in the country.â
âI know.â
âYou said that like you were telling me the weather.â
âI didnât think it was important.â You shrug.
He barks out a disbelieving laugh before pressing a kiss against your temple.
âIâve been spoiling you, kissing you, had your cute ass sitting in my lap for months, and only now I find out youâre secretly a genius.â
âIâm not secretly a genius.â
âNo?â
âIâm openly a genius.â
The answer came so earnestly that he burst into laughter.
âThere she is.â
âWhat?â
âMy weird little girlfriend.â
Your face lit up. âOh!â You immediately reach for your phone. âDo you wanna see the bee fridge?â
Katsuki blinks.
âThe what?â
âThe bee fridge.â
âThe bee fridge.â
âMhm.â
You unlock your bright pink phone, covered in stickers, tiny charms dangling from the case, and proudly hold up the screen.
He looks. Then blinks. Then he looks again.
âAre thoseâŚ?â
âTheyâre my bees.â
âIn takeout sauce tubs?â
âMhm.â
âInside a fridge.â
âThe bee fridge.â
He looks at the phone. Then at you. Then back at the phone.
âSweetheart. What exactly am I looking at?â
âThe bees are sleeping.â
âIâm sorry?â
âYou have to chill them before handling them.â You explain it with the same casual tone someone might use to explain how to boil pasta: âThey slow down when theyâre cold, so they donât sting you.â
âRight.â
âSo they have naps.â
He rubs his free hand over his face.
âYou call temporary cold-induced stupor-â
âA nap.â
âA nap.â
âMhm.â
He couldnât help smiling. âYou are the cutest nerd Iâve ever met.â
You beam at the compliment.
âI was testing the LDâ â of a new pesticide.â
His smile disappears.
âYou were doing what?â
âItâs the lethal dose.â
âThe lethal-â
âFifty.â
âAngel.â
âMhm?â
âI understood exactly three words in that sentence.â
You laugh, leaning back against him. âItâs basically figuring out how much pesticide it takes before fifty per cent of the bees die.â
âRight...â
âIt helps determine toxicity.â
He stares at the phone again.
âSo, you bought bees. Put them in little tubs. Made a bee fridge. Then scientifically poisoned them.â
âWhen you say it like that, it sounds mean.â
He looks at you with complete disbelief before laughing so hard he nearly missed the television entirely. âIâve been dating an adorable little scientist this whole time.â
You nod proudly, âThey let me be a scientist.â
âThey really do.â
âAnd Iâm good at it.â
âYeah,â he mutters softly, kissing your hair, âI can see that.â
For a moment, he let you continue, trying to focus his attention back on the late-night rerun of a film he liked. It took him less than five seconds for his rough hand to continue its pattern up your thigh, tracing shapes into your skin with his thumb. You shiver lightly as he massaged the soft flesh of your inner thigh, instantly making his attention snap back to you.
âEasily distracted, arenât you?â Katsuki smirks against your shoulder. âFind out youâre the smartest girl I know, yet here you are, pausing everything because I touched you.â
He tugs you closer, getting you settled as close as possible between his thighs, your back pressed to his chest. âCanât help yourself, hm? Getting all needy on me?â
You shudder as his touch draws closer, the heat suddenly pooling between your thighs; you quickly shut the textbook, discarding it with ease.
âDonât be mean-â You whine, throwing the book to the side to hold onto his strong arm instead.
âNot being mean,â Katsuki corrects, his voice low as he noses against the sensitive skin of your neck, pressing soft kisses there, âJust think itâs cute how easy it is to fluster you. Find out youâre some little nerd and you still turn to putty if my hands are on you.â
His hand slides higher, tracing the fabric of your tiny sleep shorts, âYouâre just too cute not to.â
It had become commonplace for Katsuki to place his hand over the plush of your mound, his middle finger pushing against the damp spot of your sleep shorts, already soaking through your panties at just a hint of his touch.
âKeep talking, sweetheart,â he murmured against your shoulder, pressing a little harder against your needy cunt, âtell me more about how smart you are. Donât get distracted by me.â
You can only shudder, like your brain immediately shuts offline the second he wraps around you.
âCanât think about stuff when youâre playing with me,â you barely manage to stutter out, gasping when he pulls your shorts and panties to the side, dragging his calloused fingers through the arousal soaking from your cunt.
âBaby,â he pouts, patronising and mean, âyou say that like itâs a bad thing. Such a smart girl nâ your pretty little head goes empty when I touch you here.â
You whimper pathetically, hips arching and chasing into his touch as he skillfully circles your throbbing clit.
âYou gonna be a good girl? Keep talking about your studies fâme while I play with this pretty pussy?â
You can only shake your head, thighs already trembling as he keeps you spread wide, biting your lip to muffle mortifying little moans.
âNo? So smart nâ yet so dumb by my fingers,â Katsuki chuckles gruffly, teasing at your hole before finally filling you with his fingers, making you arch your back and let out a sweet little gasp that went straight to his spine, âgonna let me break that pretty little brain? Fuck you stupid?â
You nod, your gasps mixing with the lewd sounds of his fingers scissoring your gummy walls. Your toes curl as he curls against the spot that makes your tummy tighten.
âThatâs my girl,â he mutters, stroking just right, making you see white, studying now firmly the furthest thing from your mind, âyou gonna cum around my fingers, nâ then Iâll really fuck all the thought outta you.â
His thumb joins his fingers, circling against your sensitive nerves, quickly pushing you to the edge and over with a wanton, broken cry of his name, gushing over his digits, thighs clamping around his wrist.
He doesnât give you time to rest, hands slotting under your knees as he lifts you, still keeping his chest to your back. Heâs fast, with one arm joining under both your legs, freeing himself in one rough motion, his cock heavy; already flush and leaking.
The slide of his aching tip between your folds makes you spasm, jolts going down your spine, unable to move much in the way he has you held.
He sinks you roughly, settling to the hilt, stretching your snug cunt around him. âKatsuki-!â You whine high in your throat, the sudden fullness knocking the air from your lungs.
He keeps his arm under your knees, spread open and helpless, shuddering as he thrusts his hips up slowly, grinding against every spot that makes your legs jolt.
Your nails scramble across his bicep, looking for purchase; he gives you no time to adjust as slow rolls turn to a punishing, mean pace. He fucks up into you, snapping his hips against yours, groaning deeply every time your walls clench and flutter around his length.
âYeah, baby, I know,â Katsuki grunts, hitting every spot that makes your toes curl, âgonna get that pretty brain melted, hm?â
His free hand, the one not holding you, reaches down, drawing mean hearts against your clit. Your back bows, cunt clenching around him, coming undone without room to move. Katsuki groans, nearly pained at the sudden tightness, the sound of skin on skin thumping in the quiet living room of his apartment.
He follows soon after, biting his lip to muffle his moans, cursing under his breath as he spills inside of you, filling up your tummy with white warmth. He doesnât let you go as he grinds up into you, rolling you both through the aftershocks.













