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Would Never be Anyone Else

Summary:

On a mission Shigaraki gets hit by an aphrodisiac quirk that gives him hallucinations of reader that end too soon. Reader shows up to help but he can't tell what's real anymore.

Notes:

Hi! This is my first time writing fanfiction or smut, open to advice!

Chapter 1: Nightmare

Chapter Text

He missed it. Fucked up and didn’t see the opponent lurking in the shadows. The puff of glittering smoke was blown directly into his face and he hadn’t had the opportunity to register it before breathing in. In the moment he felt nothing, only surged forward and felt the gratifying sensation of his assailant crumbling beneath his fingertips. After the fight had concluded, and they had gotten what they’d come for, he felt it. 

Immediately, Tomura knew it was related to the suspicious smoke. He staggered, and quickly located Kurogiri among the group and snapped at him to take them back to their temporary base, immediately. 

Annoyingly, it seemed Dabi knew precisely what was happening. He must have seen the smoke, and was able to tell. The pink dusting his cheeks, his increasingly labored breathing, and his now uncomfortably tight pants gave him away. He resisted the urge to lash out at the smirk stretched across the asshole’s face. 

 

“No one bothers me.”

 

He couldn’t care less about how he’d snapped at his comrades despite their successful mission, he had to get to his room NOW. He tore through the dilapidated building and slammed his door behind him, practically tearing his clothes off as he ran to the bathroom and started the shower. Distantly, he thought how unfair it was that the effect of his attacker’s quirk could haunt him after their death, but all thoughts were distinctly hazy now. 

He was making a considerable effort to keep his mind anywhere but on his predicament, because he knew it would lead to thinking about you.

 

Anytime he had found himself fantasizing in the last couple of months, it had always been with you. Afterwards, he always felt a type of shame, and anger at himself and you for his thoughts. You were just so goddamn perfect to him. Gorgeous, clever, interesting, and talented. Maybe if you weren’t so perfect he could have approached you and satisfied his lust and moved on. But he knew there was never any chance you would be interested in him. 

He didn’t think he could handle your disgust, your rejection. And he couldn’t lose you as a member of the league, you were too useful, too important to the others… Plus, if he was being honest with himself, he didn’t just want you once, didn’t just want your body. He wanted you, all of you. He wanted you to be his. 

 

He had been doing well since Kamino, keeping his indecent thoughts from invading. The knowledge that he had less privacy here definitely played a part. Though some fantasies of his involved you accidentally walking in on him, or overhearing and coming to investigate, he knew that if it were to happen in reality it would be more like a nightmare than a fantasy. 

 

But here he was, thanks to that NPC  and his own lapse in judgment, standing below a weak curtain of cold water with his cock fisted tightly as he mind clouded over. In his mind you were there, kneeling in front of him, water streaming down the side of your face and catching on your eyelashes as you gazed up at him and begged him to let you touch him. He gritted his teeth, feeling himself get impossibly harder. Just as he was about to have his imaginary you take his cock deep in your throat there was a noise from the door. 

 

He snapped his eyes open and wearily turned his gaze towards the source. It was you. You were standing there, eyes wide, covering your mouth. He was so lost in the aphrodisiac haze that he couldn’t find it in himself to be embarrassed or to stop what he did next. 

He swiftly exited the bath and grabbed you by your arm, pulling you to him and crashing his mouth into yours. He used his quirk to disintegrate your clothes and grabbed your hand in a delicate but harsh three fingered grip and brought it around his cock. 

You hesitantly kissed him back, and after a moment he felt your small hand wrap around his shaft and he sighed against your skin. Finding he was overheating again, he picked you up and walked you both back to the shower. He resumed kissing you for just a moment before shoving down on your shoulders and motioning to his erection, “Suck.”

You seemed shy, but responded nevertheless, gliding your tongue over his swollen head before closing your perfect lips around it. As adorable as it was, he didn’t have the patience for this now. He grabbed the back of you head, keeping his pinkies lifted, and pulled you in until your nose brushed against his skin and you gagged helplessly around him. 

Tomura groaned, keeping you there before pulling out, only the shove roughly back in and set a harsh pace as he fucked your face recklessly. He was desperate for release, some part of him raged against his actions, the fact that he was treating you this way, that this was happening because of some quirk attack that he should have seen coming. 

 

He was getting close, the feeling overwhelming him and providing him with a preemptive swell of relief, before everything stopped. 

You were gone. Disappeared before his eyes, your touch, the feel of your warm mouth, all instantly gone. Devastated he thought he had been careless and let all of his fingers land on your skin, his heart seemed to stop for a beat and he felt like he had been punched in the gut, like he would be sick.

But there was no decay, no remains that showed evidence of his crime. Only clear water pooling and swirling its way down the drain at his feet. 

So… he hadn’t accidentally killed her. Was he hallucinating?  Did this quirk take things even further by bringing fantasies to life? 

He was suddenly very aware that nothing had been resolved. He was still throbbing, his cock so hard it was painful. He tried stroking himself, but his touch suddenly felt like sandpaper against his sensitive skin. 

No, no, no no no no. This was too much, he slammed his fist against the wall. At least it felt like his skin had cooled off somewhat. He shut off the water and dragged a towel over his skin before re-entering his room and taking a seat in his desk chair. 

He glared at his cock as it bobbed and twitched against his pale stomach. Trying again, it still felt like torture to try to do anything about it himself. Fuck, what is this? The haze in his mind only grew, the only sensation he had left was his own heartbeat surging through his hard-on and the mind-numbing waves of arousal he felt growing with each passing second. 

“Can I help you with that?”

He would have jumped if he hadn’t been so drunk on this feeling, he lifted his gaze to find you, again. This time you were dressed in the sexy PJs he had once glimpsed you in when he went to the kitchen for a drink in the middle of the night. The short shorts rested so softly against your thighs, the tank top leaving little to the imagination. You kneeled slowly next to him and rested your hands on the arm of his chair. “Shigaraki, please can I help you?”

His cock jumped at your words, as if responding for him. He nodded dumbly and watched you crawl your way in front of him and take him into your hands. Your beautiful eyes fixated on his cock as he stared down at you, tracing your features with his eyes. You bit your lip and his heart throbbed. “Y/N, please.”

Your gaze met his and you smirked, sensually taking him into your mouth, running your tongue along every ridge and gently sucking his balls into your mouth. He moaned outright, his head falling back against the chair as he finally felt something other than the need that was becoming painful. The pleasure you gave him with your mouth quickly brought him to the edge, and he was so close, so close, fuck, yes- please… and then once again you were gone. 

He let out a frustrated growl, his nails started digging into the abused flesh of his neck. This quirk was toying with him. Giving you to him only to tear you away before he could finish and be done with this hell. The quirk was fucking edging him. He suddenly wished he hadn’t killed the culprit so quickly and painlessly. Should have dragged that shit out. 

 

This was torture. 

 

Over and over you came to him, and the haze in his mind kept him from acknowledging that it wasn’t real, kept him from remembering, until it was too late, that you would never stay long enough for him to get what he needed. 

The last time you had taken it further, sitting on top of him on his bed, sinking down onto his cock. You faded slowly that time, and he sobbed. He begged you not to leave, to have mercy on him.

Even after you were gone he cried and murmured at the ceiling that he needed you, that he loved you, that he couldn’t live without you. Begging the ceiling tiles to give him the opportunity to have you fully, to finish and leave this torture, begging for the real you to be there, and never disappear like these cursed illusions. 

 

You had begun to appear only to taunt him. He would spot you nosing around his room in his clothes, stripping in the bathroom just beyond the cracked door, gaming in his chair. You even teased him, denied him playfully as if he wasn’t desperate and broken for you, lying helplessly on his bed. He was exhausted, weary, and heartbroken. Every time you came you were less yourself, crueler, callous, and still every time you left it hurt as bad as the first time. 

 

On top of your repetitive abandonment, he still could not do anything to help himself, the discomfort had only gotten worse when he’d tried to take care of things on his own. 

 

The haze was swallowing him up again and he knew you’d be appearing again before long. He was too out of it to notice that there was something different about this time. That the door to his room had actually opened, that you had come in with a look of concern, and not the taunting, cruel look his hallucinations had developed.

He didn’t see the situation registering with you, or the intense blush that spread across your cheeks. 

“Please, please, Y/N, don’t leave me this time. I need you so bad, don’t go, please stay with me, don’t leave me.”

Your look of concern intensified and you moved towards him, “I wouldn’t leave you Shigaraki, why would you think I would leave you?”

He whimpered, his gaze settling back on the ceiling, “You’ve been doing it all night, it’s killing me”

“Are you hallucinating, Shigaraki?”

If he had been in his right mind he might have registered that in his fantasies you only ever used his name, you’d never called him Shigaraki. But if he was in his right mind he would have noticed plenty of other differences that might have clued him into the truth. 

“Of course, this could never be real. This dream is now my nightmare.”

You tilted your head, considering this. You had been making an effort to keep your eyes on his face, though it hurt you to see it tear streaked and hollow. 

You guessed from what Dabi had said when you got back that your boss was under the influence of some kind of aphrodisiac quirk, but you never imagined that it would result in something like this. The room had been so quiet that when you heard a sob you couldn’t stop yourself from coming in to check on him. It had been over 24 hours since the raid mission, and you were getting more and more worried about your boss.

 

You whispered, “Is it always me?” your heart was throbbing painfully seeing his tortured expression, but it was also racing. 

You had never dared hope that the feelings you had for your boss were reciprocated, and didn’t feel great about finding out about it this way, but you needed to know now. 

 

“It would never be anyone else.”

 

You sat gently on the bed, “Can I kiss you?”

 

His eyes sparked, showing some life for the first time during this interaction. His unfocused gaze landed on you and he limply reached for you, gliding his fingers over your cheek, “You never have to ask, the answer is always going to be yes.”

You blush, heart thundering in your chest, and you lean over and capture his lips with yours. He responds passionately, despite his clear exhaustion. You lose yourself in the feeling of his lips on yours, the cracks in his skin scraping against your soft mouth becoming slick with a combination of your saliva and chapstick. You kiss him until you’re running out of breath and he grunts against your mouth.

You pull back and look at him. Right, he’s desperate right now, this probably isn’t helping. 

 

“How do you want me?”

 

Despite a flash of hope, he looked sad, but still desperate. You wanted to assure him you wouldn’t go anywhere but you were sure he wouldn’t believe you. He thought you were a hallucination. You didn’t like the scenario being your first kiss or anything else with him but you knew that if the effects of that quirk had lasted this long, there was no way he would be able to rest until he could finish. 

“Ride me, I - I can’t get up anymore.” He was embarrassed and annoyed with that, you could tell. If he had known you were real he probably would have exhausted himself even more just to avoid letting you know how bad things really were. 

 

You kissed him, and got up before stripping out of your clothes, leaving them behind on the floor without second thought. Crawling up onto the bed you swung your right leg over his hips and kissed him again, “I’m not going anywhere this time, Shigaraki, I promise.”

He shivered at that statement, though he didn’t really believe you. You lowered your hips and gently guided his cock to your entrance. 

You had been making the point not to look at first so you were startled by the size at first. He was absurdly hard, but the spongy skin of his tip, coated with a sheen of sweat and precum felt amazing against your lower lips. 

 

Again you regret that this is how your first time with him is going to go, you wish he knew it was real, that you were here, that you wanted him. 

 

Slowly, you sink down onto him, holding your breath until he bottoms out, and letting out a moan once you feel the sting of the stretch settle and resonate in your core. You stay like that for a moment, feeling yourself clench as you get used to his size. At the same time he lets out a moan that was so sinfully beautiful you’re sure he can feel you get wetter and clench harder in response. He clenches his hands into tight fists and rests them on your hips to urge you to move.

“Y/N, please, love, need you.”

Satisfied that you’d be able to handle the stretch now, you leaned back over him and kissed his temple, rocking your hips up and then rolling them back down, slowly at first. You kissed the other side of his head, then his forehead, moving faster, you drifted your lips around his jawline and gently kissed the inflamed skin of his neck. You reached a pace you could tell he liked before reaching his collarbone and sucking a patch of skin into your mouth. You wanted to leave marks so that he would know tomorrow that this was real. If he had the energy, you would have let him mark all over your body, but this would be good for now. You had the feeling this would be one of your only chances to have him so docile and submissive. 

 

He moaned again, and you felt the blood rushing to your clit throb in time with your thundering heartbeat. You shifted to support your weight on one arm and reached between the two of you to drag a finger over the sensitive bud. 

“Fuck, your squeezing me so tight, don’t stop, please, feels- feels so good.”

You double your efforts and shift your head up to capture his lips again. You swallowed his next moan and lamented the loss of it, pulling back to watch his face and let your ears experience the next heavenly gasp from his mouth. He was putting some effort into thrusting up into you now, making you sure he was getting close. You speed up your motions on your clit and purposefully clench on his cock. 

The tension is gathering in your core, heat spreading from your hips to your toes, “T- Tomura, I’m gonna cum,” you whimper, “cum with me Tomura, I want you to come inside me please.”

 

Like your words had suddenly caused him to snap, his grip on your hips became more solid and he quickly reversed your positions without slipping out of you. You arched your back as he started slamming into you, and wrapped your arms and legs around him, pulling him close. “You can’t, you can’t leave now. You’re mine, Y/N, don’t leave me.” 

You choked on emotions that came with his statement, a tear slipping down your face as you held onto your orgasm, waiting for him. “I won’t, Tomura I won’t ever leave you, I’m not going anywhere.”

 

“Cum on my cock Y/N, need to feel it, need it - fuck - so bad.”

 

With that you let go, letting the heat and euphoria wash over you until you are shaking as you clutch onto him as he fucks you through it, a sudden harsh thrust and pause letting you know he’s finally reached his release. After a few more thrusts, you feel him relax, collapsing onto you, holding you close and kissing any inch of skin within reach. “Love you so much, fuck, want you so badly… Y/N” His words trail off as he drifts off, you kiss the top of his head and whisper back, “I love you too Tomura.”