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It isn’t until Katsuki returns home and presses his usual kiss against Izuku’s lips that he realizes.
… always feels so nice when he uses his tongue.
Katsuki immediately pulls back, frowning, having to catch Izuku as the idiot stumbles forward since he was leaning too much of his weight against him.
“What the fuck?” Katsuki says, immediately being bombarded again with the strange thoughts that sound exactly like his boyfriend’s.
he’s acting a bit weird, did he have a bad day at work, what’s wrong, why is he so hot, I hope nothing bad happened, maybe—
Katsuki shoves Izuku off him and, immediately, the incessant thoughts stop.
So, he was obviously hit by some kind of fucking mindreading quirk. He stands there, staring at Izuku while trying to figure out what activates it. Maybe it’s because Izuku’s dating him? Maybe it’s because Katsuki has feelings for him, or vice versa? But why wouldn’t he be able to read his mind right now, it’s not as if they’d stop feeling that way… ah.
“Kacchan…? What’s wrong?”
Katsuki sighs, reaching out and putting his palm against Izuku’s cheek. Immediately, he hears Izuku again.
…wrong, something definitely happened, or maybe he just wants to touch me, oh maybe he’s just feeling emotional again, I love when he feels emotional, maybe he’ll cry for me, I love seeing his tears, he looks so pretty, his hand is so warm, he’s so powerful, I can’t believe how amazing his quirk is, I hope he cooks for us tonight, he’s looking at me so long, something is definitely wrong, oh no—
“Kacchan, something’s obviously wrong, are you okay?”
Katsuki blinks, pulling his hand back as he tries his best not to die on the spot from embarrassment before strangling his freak of a boyfriend. What does Izuku mean when he thought about how much he likes to see Katsuki cry, what the fuck?
He had decided he was going to tell Izuku, but now, he’s too curious about what the hell else his weirdo partner thinks about him. Oh, he’s going to absolutely love this.
Katsuki shrugs. “Just wanted to touch you, nerd.” He steps past Izuku, heading to their bedroom so he can get changed into something more comfortable. Izuku trails after him, pausing by the door, and Katsuki immediately knows what he wants to ask. He laughs. “Yes, I’ll make us dinner tonight.”
Izuku beams at him.
By hour three after realizing his new predicament, Katsuki realizes he was definitely Not equipped to deal with the full force of Midoriya Izuku’s thoughts. Especially when Izuku tempts and practically seduces him (he just asked Katsuki nicely) to cuddle with him on the couch. Katsuki’s curled up against him, trying his best not to let his skin make direct contact (he realized it takes direct skin-to-skin contact pretty fucking quickly), which is nearly impossible since the nerd likes to feel him up so much. Katsuki also isn’t doing much to stop himself from pressing soft kisses against Izuku’s neck every now and then, too.
… skin is so soft, I want to bite him, I love him so much, does he like the movie, I hope he does, I’ll ask him his favorite scenes after, or maybe I’ll convince him to have sex again, he’s so easy to convince sometimes, so predictable, I love his hair, I want to tie him up tonight, he’s so pretty, how is he so pretty, ah, that feels so nice, I love when he’s so needy like this, he’s so cute, he’s so cute, fuck that feels so good, does he even realize what he’s doing right now, oh my god this guy is so annoying why does he not realize that’s his mother like they have the exact same quirk too what a complete idiot, KACCHAN IS LICKING ME—
Katsuki smirks as Izuku gasps, drawing back and scowling down at Katsuki. “Why are you licking me?!”
Katsuki rolls his eyes, pressing another kiss (AHHHHHHH!) against Izuku’s neck and then finally sitting back up, throwing his arm around Izuku’s shoulder, careful not to touch any skin. “Thought you liked it when I do that shit, weirdo.”
Izuku blushes, and Katsuki rolls his eyes again.
“Yeah, but how am I supposed to focus on the movie if you’re trying to, like, eat me?”
“It’s a stupid movie anyway, how can the guy not realize that’s his mom?” Katsuki hadn’t been paying attention to the film at all, too tired from work and too comfortable just pressed up against his boyfriend to care. But it seems being able to read the dork’s thoughts have finally come in handy for something else that isn’t just outrageously horny because Izuku lights up like a fucking firework.
“That’s exactly what I was thinking! It’s so weird! I can’t even tell if it’s supposed to be that obvious…? Maybe the director thought it wouldn’t be, but surely it has to be a purposeful choice…? Ah, I don’t know, but I was wondering what you thought about it, so it’s nice to know that you agree with me.”
Izuku’s so cute. Katsuki kisses him, Izuku’s hand settling comfortably on Katsuki’s lower back as Katsuki twists his body so he’s straddling him instead. Izuku’s thoughts are, predictably, absolutely batshit insane.
… so so sexy like this, how come he’s being so needy today, was he lying to me earlier when he said nothing happened, but no he doesn’t really lie to me anymore, oh god he feels so good, I want to touch him, I want to be inside him, I want to mark his entire body up I want him to feel good forever I want him I want him I want him, fuck he really wants it today, he loves me I love him so much I want him so much I love him I love him, I want to fuck him until he sobs, I love him, he looks so gorgeous like this, I want him naked, he should be filled up and stuffed full with my cock want to see him writhing around I need to move us now who cares about the movie oh but should I turn it off at least I don’t want to waste electricity Kacchan would prefer me to turn it off okay I’ll do that now shit he’s so hard oh my god how is he so hard already he’s so so needy today I love it I want him I want him—
Katsuki groans, overwhelmed by how fucking hot this is, actually, because holy shit, Izuku is such a pervert and he loves Katsuki so much and, shit, he can’t even tell what are his thoughts and Izuku’s anymore, he just wants to get fucked now.
“Turn off the stupid T.V., Izuku,” Katsuki mutters, removing himself from Izuku’s lap, suddenly feeling empty from how silent his mind has become, Izuku no longer touching him. Katsuki’s already moving to their bedroom, leaving his clothes on since he knows how much Izuku likes taking them off him.
He hears Izuku stumble after him after hearing the movie abruptly shut off, and before Katsuki can lie down himself, Izuku is already there, touching him everywhere before pushing him back against the bed, pressing his legs right in between Katsuki’s thighs, his knee pressing against his cock. He begins to undress him, pulling his pants down and off, folding them quickly just as he knows Katsuki prefers.
…want to ruin him completely, he’ll never think of anybody else except me, I want to own him, I want to own him, need to finish undressing him, need to touch his pretty cock, want to leave him begging for me for hours, he’d like it in the end, he’s so sexy, please I need to see him cry, want to see him cry, want to bite into every part of his skin, want him to know he’s mine, I love him, I love him, he looks so pretty with my bruises on him, want him so much, he’s so pretty, he looks so pretty, oh god his voice I love when he moans like this nobody else can have him nobody else gets to see him like this he’s mine he’s mine want to bite him—
Katsuki’s going to die, holy shit, Izuku’s thoughts are too much and when Izuku leans down, pushing Katsuki farther up the bed so he has better access, he nips softly at Katsuki’s thighs before sucking and biting marks onto him. Katsuki’s entire body is shaking now, feeling every horny, loving thought Izuku is currently fucking thinking about him while also marking him up and wanting to nearly sob from how overstimulating it all is.
is he about to cry please please please he’s so needy I want to know what happened why is he like this I’m so happy he is I love him please I want to see his tears I want to keep marking him he’ll never think of anyone else except me want to plug him up and just keep him here for me all the time like my own beautiful doll—
Katsuki moans, writhing as Izuku keeps thinking filthy thoughts about him, completely unaware that Katsuki can hear every single word. Izuku holds him down as he moves from leaving bruises on his thighs to taking Katsuki’s cock in his mouth instead. Instantly, Katsuki tries to buck his hips, panting Izuku’s name as if he’ll never be embarrassed by it again, and Izuku takes him even more, grabbing Katsuki’s hands and bringing them to Izuku’s hair.
Izuku’s thoughts are just an endless string of, tastes so good hmmm want him like this forever I love making him feel good I love him he loves me want him to beg love to see him like this he’s so—
“’zuku,” Katsuki slurs out, shutting his eyes tight as he grips Izuku’s hair harshly, pressing Izuku all the way down, his nose pressed up against his balls. “Please, please, please need more, please.”
Izuku sucks, humming slightly as he lets Katsuki fuck up into him, which has Katsuki in absolute shambles, tears pricking at his eyes as he finally comes. Izuku, of course, doesn’t waste a drop, Katsuki too blissed out to barely pay attention to the TASTES SO GOOD WANT TO TASTE MORE LOVE HIM LOVE HIM that Izuku is practically screaming at him.
Izuku spends the next minute finally undressing himself as Katsuki simply lies there, already spent, vaguely missing the constant stream of Izuku’s horny thoughts. Finally, Izuku’s hands are on Katsuki again, pulling off his shirt and folding that, too, something that makes Katsuki smile a bit at him. He loves this nerd so, so much.
Before Katsuki can get even sappier, Izuku is back on him, reaching forward and pinching both of Katsuki’s nipples, his eyes hungry as Katsuki gasps, arching up into his touch.
… love his nipples want them for my own he loves this so much I need to fuck him right now he wants it so much I could probably just put it inside and he’d like it he loves the pain he loves it when he knows he’s mine he’s such a slut for me and for me only always just me he’s mine I’m his I love him want to twist his nipples forever want them on display forever just like this hard and aching—
“Deku, fuck me right now,” Katsuki demands, not being able to stand hearing everything Izuku wants to do with him and not just acting on it already.
Izuku looks at him, wide-eyed and too innocently for comfort. “But I’m not done playing with Kacchan’s nipples yet.”
Katsuki groans, wanting to die because he knows what that means for him, and he’s right when Izuku spends the next five minutes simply touching Katsuki all over, his hands rubbing over ever single part of him, from his nipples to his cock to his hole to his legs to his feet to his face to his neck to his ears to everywhere.
Izuku hovers over Katsuki’s entire body before slowly dropping his weight onto him, Katsuki moaning at the full-body contact. Izuku captures his moan in his mouth, sucking at his tongue as he thinks loudly how good Kacchan tastes and how good Kacchan is for him and how nothing feels better than being inside his Kacchan and—
“Izuku, please,” Katsuki whispers, half-begging, Izuku sucking and biting marks on his neck down to his collarbones down to his nipples. Katsuki really is going to die like this, and he’s going to kill the fucking nerd for making him go out like this.
“What do you want me to do, Kacchan? You’re not being very clear right now,” Izuku mumbles evilly against his skin, pressing a light kiss against Katsuki’s bellybutton. Katsuki meets Izuku’s gaze directly, Izuku staring up at him as if he’s the most precious thing in the world, which Katsuki knows is true by the he means everything to me I love him I want him I want him to be happy I want him to look at me like this forever he’s so gorgeous and good for me he hears spilling from Izuku’s mind like warm honey into hot tea.
Katsuki can’t keep looking at him while also hearing him, it’s too much, so he screws his eyes shut again, taking a few deep breaths as Izuku starts to lightly play with his hole, simply resting his pointer finger against it, pressing in just gently but not enough.
“Want you to fuck me,” Katsuki finally manages to say, hating how strangled the words come out. Izuku hums, reaching up and playing with Katsuki’s cock, wetting his finger with his precum before trailing back down and pressing it inside Katsuki completely.
Katsuki whines, trying to arch his back up again, but Izuku holds him down.
… seeing him suck up my finger like this it’s so hot, he’s so hot, it’s so sad he can’t experience fucking himself the way I’m going to fuck him, want to see his own cock enter inside him and fill him up as he thinks about me and I could join him I could have his cock and mine inside him filling him up with our cum and he wouldn’t be able to move afterwards I could play with him all I like and he’d let me because he loves me just as much as I love him—
“Holy fuck,” Katsuki can’t help but groan out loud, needing Izuku to shut the hell up or fuck him already or both, he doesn’t know, he just knows he needs to start writing Izuku’s stupid eulogy for after he kills him for killing him, just like he promised to himself earlier.
Izuku leans up and kisses him again, Katsuki letting Izuku maneuver his mouth however he wants. “Do you like that, Kacchan? Like my finger inside you? You always take it so greedily, like you were made for it, made for me.”
“Just fuck me already, please, please, I—” Izuku shuts him up by kissing him even harder, all while thinking about how much he loves Kacchan and how much he’ll always love Kacchan.
Izuku removes himself from the bed completely then, grabbing their lube and returning to prep Katsuki, who can barely even think from how hard and overwhelmed he feels. Of course he knew that Izuku loved him, his boyfriend tells it to him every single day, but truly hearing it… truly just feeling every single thought Izuku thinks about him, his Kacchan, it’s too much, it’s all just way too fucking much.
He can barely keep his coherency as Izuku begins to prep him, praising him both out loud and in his thoughts, and eventually it all gets jumbled together, Katsuki unable to say or do anything besides whine and writhe around, his body pleading for more. Izuku laughs softly at him at some point, so fond as he calls Katsuki perfect and all for him, and Katsuki feels like his heart might cave in, or maybe it’ll dig itself out and find its home right next to Izuku’s, the only place it truly fits, in the end.
When Izuku finally breaches him, the slide of Izuku’s cock inside him so familiar, Katsuki starts crying, every single one of Izuku’s annoying loving thoughts filling him up so immensely that he doesn’t know what to do with any of it.
… feels so good oh my god oh he’s crying why is he crying oh he looks so gorgeous why is he crying am I hurting him oh my god wait—
Izuku stills, and Katsuki bucks up against him, more of Izuku’s cock sliding into him, Izuku keening in reply, his body collapsing fully on top of Katsuki.
“Kacchan, why are you crying, are you okay, please, Kacchan, do you need me to stop?”
Katsuki can’t reply, only able to shake his head as he presses up even more, wanting Izuku to take the hint already and fuck him. Izuku lets out a shaky breath, pressing his forehead against Katsuki’s, and Katsuki looks straight up at him, Izuku’s tears sudden but not surprising as they fall gently onto Katsuki’s cheeks and nose.
Fuck, Katsuki was made to love Izuku. He was made for this. He never wants to stop loving him.
Izuku seems to finally let himself lose himself as he starts fucking Katsuki in earnest now, his thoughts such a muddled and emotional mess that Katsuki can’t even tell what’s his own body and what’s Izuku’s.
Holy shit, who knew mind reading would be so fucking awesome?
“K-Kacchan, I’m going to—” Izuku fucks him even harder, just like they both like it, and Katsuki’s legs are wrapped so tightly around Izuku that he’s sure his heels are going to leave bruises, something he knows the freak adores.
… so pretty when he cries I’m going to I’m going to he’s so gorgeous I love him I adore him I want him forever I want him I want him he’s perfect does he even know how perfect he is he feels so so so GOOD he feels so good around me just like always I want to live inside him I want to be inside him forever please please I can’t even oh I’m going to—
Izuku is whining as he fucks Katsuki so hard that Katsuki can only focus on every single push and drag of his cock inside him, and, finally, Izuku stills, releasing inside him, Katsuki moaning at the warmth of it, and before he can do or say anything, Izuku is reaching down between him and grabbing Katsuki’s cock, firm and relentless, and it’s all too much, fuck it’s too much—
“Want you to come on my cock, baby, please, Kacchan, want to see you,” Izuku mumbles out, pressing a sloppy kiss against his lips, and Katsuki comes again, eyes shutting tightly together again, his body shaking as Izuku just continues to devour him.
love you I love you I love you I love you so much Kacchan I love you I love you I want to consume him I want to fuck him and then I want to cut him up and eat him and have him inside me forever and then I want to see him cry more around me and I love—
“What the fuck?” Katsuki breathes out then, opening his eyes and frowning at the deranged man on top of him who is nestled inside him like he didn’t just think how he wants to cut him up and— “What the fuck do you mean you want to eat me, should I be fucking worried, shitnerd?!”
Izuku blinks blearily at him, eyebrows furrowing together as slowly takes in and considers Katsuki’s words.
… wha…? Can he… how did he know that… wait… is that why he’s been so weird today can he… CAN YOU READ MY THOUGHTS, KACCHAN?! YOU ARE SO SEXY AND I LOVE YOU! DID YOU HEAR ME JUST THINK THAT? Wait, no, what number am I thinking of, oh I need to think of a number, twenty of course, okay the number is twenty, can you hear me, Kacchan, maybe I’m crazy—
Katsuki snorts and then scowls up at Izuku, who shifts inside him, making them both let out a small gasp. Katsuki shoves him off, gasping again at the emptiness he suddenly feels. He pushes Izuku down and quickly gets on top of him, using his hands to press down on him, refusing to let him move. Izuku only stares wide-eyed up at him, realization dimming in his eyes. “You are crazy! What do you mean you want to cut me up and eat me! And I didn’t know me crying was such a kink for you! What the fuck, shitty Deku, you don’t think to tell me these things, aren’t we dating?”
Izuku blinks once. Twice. Then, he breathes out, slow and steady, before that obviously does not work and he starts breathing quickly again. He lets out an awkward laugh. “Uh, so you can hear my thoughts?”
Katsuki rolls his eyes. “Yes. Twenty, okay? That’s the number you were thinking of, but that’s not important considering you want to tie me up and have me lie around to be your personal sex doll or something.”
Izuku’s entire face goes completely red. “It’s not like that, Kacchan! I swear! It’s just!” Katsuki glares down at him. “I love you so much, it’s overwhelming, okay?! Seeing you like that under me, you don’t understand what it’s like to see you like that, to see how gorgeous you are, you’re my favorite person ever, Kacchan.” Izuku takes a deep breath, and when Katsuki focuses on just how panicked Izuku’s thoughts are, he stops glaring at him. “Do you hate me, Kacchan? Do you not… do you not feel comfortable with me anymore? I’d understand if you didn’t, I’m sorry, I didn’t mean to make you feel like that.”
Katsuki scoffs immediately, instantly leaning down and kissing the shit out of his stupid, dumb boyfriend. “I love you, idiot. I already knew you were a freak, I love you because of it, I just didn’t understand why you never said any of that to me before.” Katsuki sits back up. He moves one of his hands up to play with Izuku’s hair. He’s always adored Izuku’s hair. “Did you feel like you couldn’t tell me? Like I’d… shame you for it, or something?”
Izuku’s eyes, somehow, grow even wider. “What, no! It’s just embarrassing, Kacchan! I never said any of it because it’s just a lot, and even I know that. I’m sure I would have told you eventually anyway… and a lot of it is just when we’re having sex, I swear! I don’t actually want to eat you, Kacchan.”
Katsuki doesn’t say anything for a minute, only looking down at Izuku as he takes in his thoughts. Izuku’s being completely honest; Katsuki nods, pleased, before letting out a small hmpf.
“Why not? I’d taste fucking great. You don’t think I’m worth the meal?”
Katsuki would usually assume Izuku’s expression meant he was baffled or surprised by this reply, but the constant OH MY GOD did he seriously just say that I want him so much proves that he’s just too horny to think properly. Katsuki rolls his eyes.
“Well, not like it matters anyway. You’re a shit cook. I’m not letting you eat me just to fucking ruin the meal, dumbass.”
Izuku seems distressed. “You do know I don’t actually want to eat you, right, Kacchan? Because you’re starting to freak me out a bit. It was just… I was just horny! I get so crazy about you, I just wanted us to be together forever, you can’t blame me for what I think when I’m horny, you should at least know that….”
Laughing, Katsuki kisses him again, mumbling out a soft, “I know, Izuku. I’m just making fun of your weird ass. In the future, though, I want to know everything about you. We’re in this together, right? So, that means even though it’s creepy as shit, I want to hear all your weird thoughts and want to see and hear how much you want me every time you’re around me, okay?”
“I think I’d get arrested or something if I said everything I wanted to say to you all the time.”
“That’s a you problem.”
“You just said we’re in this together?!”
“Another you problem.”
Izuku rolls his eyes. “You’re so annoying, I hate you.”
I love him so much.
Katsuki smirks. “No, you don’t.”
Izuku just groans. “Ughh, it’s not fair you can read my thoughts but I can’t read yours! Wait, how does the quirk even work? I’m assuming it’s a quirk? Wait, is it not a quirk? Actually, Kacchan, are you okay, should I be taking you to the hospital? What if you’re in danger or something and—”
Katsuku just shuts him up with another kiss.
(The quirk doesn’t wear off for another eight days, and in that time, they have some of the best sex in their entire lives. And, maybe that makes Katsuki a freak, too.
Well, whatever.
They’re each other’s, after all. For the rest of their lives.)