Chapter Text
Katsuki wasn’t sure what he was expecting when he went to visit his parents on a school night. Maybe he expected them to respect his schedule or to just give him his usual quick smack followed by an affectionate hug. Yeah, that was definitely what he was expecting. In and out. Just like he planned before asking the school board permission to leave the school grounds. Not this.
Upon arriving to his house, Katsuki was greeted with his second expectation, his mother smacking him across the head and shouting at him about his failure to pass his provisional license exam before promptly pulling in for a bone crushing hug and telling him how much she loved and adored him. It wasn’t too bad, Katsuki was used to it by this point. But what he didn’t expect was for his parents to keep there for longer than he anticipated, and definitely longer than he asked permission for. Of course he tried to tell them, but they pleaded with him and even offered to call the school if they gave him lip about it and even payed for his train ticket. He agreed, reluctantly of course, and he stayed for a few hours just filling them in on what was going on and what the other students are like, only because his dad asked otherwise he wouldn’t have said shit about those space fillers.
It would’ve been alright if that was all he had to endure, but as always his mind was blown at just how much more miserable his parents could make him. Not only was he held there to talk about things he wasn’t interested in discussing, yawning and stretching of tiredness, but he was also made to sit there for an even longer time while his mom cooked him up something to eat. The entirety of his stay was awful, but at least he got to see them before they start crying to him about how he doesn’t love them or some shit. He clearly showed them that he does by staying until it got dark as hell outside, an act of love so grand for him that he’s sure to never repeat something like this again for at least a year.
He rubbed at his aching eyes as he walked down to the train station, having been up way past his bedtime. It was now a few minutes past eleven at night and Katsuki was sure to be in some deep shit when he gets back to U.A. no matter if his parents called or not. If he’s lucky, he’ll get All Might to deal with him about the matter. The man was nice and all too forgiving, he’s sure to let Katsuki go just by saying he went to go see his parents. But if he’s unlucky, which he’s sure he will be, he’ll get Aizawa, a real menace to deal with early in the morning.
There was little to no people outside, making for an eerily quiet walk. It wasn’t that he was scared, he was too damn strong for that. No, it just creeped him out to no means, making the hairs on the back of his neck stand in alert. He ignores it, blaming it on his sleepiness and slows to a stop as he enters the station. There was about three people waiting for the train too, not including him of course, but there was something odd about the atmosphere around him.
His eyes narrow at the other people as the train comes by, slowing down to a stop and opening its doors. He’s quick to get inside, making sure to get a spot at the very back of the train to get away from the rest of the passengers, too tired and creeped out in general to deal with anyone right now.
He’s pleasantly surprised to see everyone else gathering all the way on the other side of the train, most of them falling asleep upon sitting down and the other too busy on his phone to put Katsuki on edge. He leans against the metal rod on one of the doors, grasping it with basically his entire body. Sure he could just sit and be more comfortable, but he’s fairly positive he’s going to do exactly what the other passengers did and fall asleep immediately, especially with the lights in the train busted, leaving him in a very relaxing darkness. He didn’t trust these kinds of things, he could get robbed or raped if he did that. So he toughs it out, grasping onto the metal rod for dear life as to not fall over when he closes his eyes for just a second to rest them.
What he doesn’t know is that the one passenger who wasn’t asleep was watching him, waiting for him to turn his back and stalking towards him when he does. His eyes were starting to feel heavier and he could feel himself start swaying in place, threatening to fall over if his hold breaks loose. In his tired state, he doesn’t realize when there’s suddenly someone standing right behind him so close that they were sharing the same air even if they weren’t facing each other.
Katsuki’s body sways backwards and into the taller person's chest, but he still doesn’t have a reaction, his entire body on the brink of falling over in sheer exhaustion. A pair of strong, and weirdly warm hands hold him by his waist, keeping him from falling but also pulling him further backwards and into their arms. It’s only then that Katsuki realizes what’s going on, but by then it’s too late. He’s fully engulfed into some man’s arms, his body too sluggish to fight back properly.
“I gotta say, kid. I really wasn’t expecting to see you here so late at night. Don't you U.A. brats have a curfew?,” the way too familiar voice breathed down Katsuki’s neck, making him shiver in both anticipation and anger.
He shoots a quick look over his shoulder, not at all happy to see Dabi, dressed in an all black attire with his hood up to cover his hair, smiling back at him. “Get your fucking hands off of me and I might just decide not to blow your sorry ass up,” he growls back, scowling when Dabi tightens his grip on him.
“I could do that. Or,” Dabi’s hands on his waist start heating up, making Katsuki let out a small gasp in surprise, “I could burn this entire train down and everyone in it. It would be such a shame for those poor bastards back there to die because a little trash mouthed kid wanted to play hero. Be a good boy and save yourself the trouble.”
A bead of sweat rolled down Katsuki’s temple. If he were to fight right now he’s sure he’d win with all the sweat that just piled up in his palms. But he’s not too sure he could stop Dabi from killing at least one passenger, especially since he was too tired to even push his hands away, it was too much of a high risk. That and he didn’t have his fucking provisional license, he’s sure to get taken down right along with Dabi if he fought back. He sighs out in resignation and wipes his sweaty palms against his black sweatpants, letting his only hope of fighting back disappear.
Dabi chuckles deeply into his ear, making his face heat up upon realizing how close they are. His back was fully pressed on Dabi’s chest and his ass was pressing up into his groin, all too close for Katsuki to stay still. He squirms around, trying his best to reposition himself so he’s not making their encounter any more inappropriate than it already was. This seems to have done nothing but annoy Dabi, who digs his fingers into his waist, surely leaving bruises at how hard he was digging into his skin.
“Hey! Quit abusing me and let me sit down or some shit my ass is-,” he stops himself before he could say anything else and glares at the metal rod he’s still holding onto, too embarrassed to explain the situation to Dabi.
There’s a small moment of pure silence before something clicks into place for Dabi. “Oh? You mean this,” he taunts, thrusting his hips forward and pressing his groin into Katsuki’s ass. This makes the blond boy yelp in surprise, trying to pull away but failing miserably every time. He’s about to shout out insults when a hand comes up to his lips, holding it there and keeping Katsuki from saying anything. “Do yourself a favor and keep your mouth shut. You have only yourself to blame for this.”
And with that, Katsuki could feel something start poking at his inner thigh, making his heart nearly jump out of his chest. He feels Dabi’s other hand travel further down his waist and to his own growing erection, slipping into his sweatpants and stroking him to full erection. If it weren’t for the hand on his mouth he’s sure he would’ve let out the filthiest moan he’s ever made, but all he could let out was a muffled moan, his body going slack against Dabi. His hands still hold the metal rod in front of him, but he could feel his grip start to loosen as Dabi works miracles on him with his hand alone. He lets his head fall back and into Dabi’s shoulder, tiny groans emitting from in between Dabi’s fingers.
“That’s all it took for you to give in?,” Dabi muses, “You’re a real slut aren’t you? I bet you were hoping this would happen.”
Katsuki tries to make an angry comment, but it only comes out as a muffled bark thanks to Dabi’s hand still holding his mouth shut. He can’t even glare at the man so he does the next best thing. He bites down on Dabi’s hand.
Dabi hisses and takes his hand away, giving Katsuki the chance to speak.
“You fucking pervert. We’re in a fucking train and there’s people in here,” he spits back, still in too much bliss to take his head off of Dabi’s shoulder. Dabi doesn’t take too kindly to the bite, taking his hand out of Katsuki’s pants and reaching up to grab his throat instead.
“So me touching is okay but doing it on a train isn’t?,” Dabi was fucking with Katsuki, but he did have a point. “Bite me again and i’ll burn that pretty face of yours.” He gives Katsuki’s throat one last squeeze before bringing two fingers up to his lips and pressing them there. “Open your mouth.”
Katsuki hesitates for a moment before deflating slightly and opening his mouth, letting the fingers invade it and slide against his tongue. They push in further than he expected, making him gag around them, seeming to please Dabi in the process.
“Calm down, kid. Just breathe,” he coos, sliding his fingers around his mouth and not doing anything to help the situation. Thankfully they don’t stay in there for very long, suddenly getting snatched from his mouth with an obscene squishing noise.
“Y-you piece of shit,” Katsuki breathes out. His scowl is quickly wiped off his face when he feels his sweats and briefs being pulled down, just to his upper thigh but enough to get his ass out.
Before he could protest, he’s being bent forward, left to hold onto his precious metal rod for dear life for the second time in one night. His ass cheeks are getting spread, too far apart to be anything but what he thinks is happening. As if on cue, Dabi slips a wet finger inside, stretching the untouched virgin hole. Katsuki gasps out in pain, but bites down on his bottom lip to keep himself from making any noise. It hurt, it hurt so damn bad but there were other people on the train and he didn’t want anyone to see him like this. He had to save what little dignity he had left.
“What a good little slut you are. I was going to make it hurt, but now I might just get you off too.” Dabi spoke with a softness to his voice, adding in a second finger into Katsuki’s hole with as much gentleness as he could.
It still hurt of course, but not as much as the first finger did. He could feel the fingers inside of him start scissoring around, stretching him in a brutally slow manner. His walls clench around Dabi’s fingers, protesting the intrusion, but Dabi still adds in a third finger. Katsuki’s eyes were full of tears and his hands were clenching against the rod, struggling to hold himself up. The pain was unbearable and he could feel himself start losing consciousness from the pain alone.
“Stay with me, Katsuki. I’m almost done here,” Dabi says, using his name and making Katsuki’s ears perk up at that.
His endurance was running thin, but he managed to hold out until Dabi’s fingers were finally pulled out, making him sigh out in relief. But his relief is cut short when he feels something bigger poking at his entrance, circling around his abused hole and threatening to push in.
“Can you handle it or am I going to have to hold your mouth shut?,” Dabi asks, taking a bit of mercy on Katsuki, even if it is just by asking if he needed to be shutted up or not.
“J-just fucking put your cock inside of me and get it over with,” Katsuki scoffs, glaring down at the train floor below him in shame.
Even when he anticipated Dabi’s cock boring inside of him, it still takes him by complete surprise when it starts entering him. He lets out a harsh groan in pain before Dabi’s hand slaps itself back over his mouth, shushing him completely. He didn’t fight against it, letting it stay there for his own sake. His eyes squeeze shut as Dabi pushes in the rest of his cock, letting it sit snug inside of his ass. There was definitely something torn inside of him, but at least it was starting to numb the pain.
He’s only held like that for a few more seconds before Dabi starts pulling back out, waiting until only the tip of his cock was inside of Katsuki before pushing back in with a violent thrust. Katsuki’s eyes roll to the back of his head in both pain and pleasure. Dabi keeps up his merciless pace, hitting in all the right spots that has Katsuki drooling into his hand.
“Mmmfh~,” Katsuki muffles out, arching his back in sheer pleasure as Dabi to full advantage of him.
“Does that feel good?,” Dabi asks in between thrusts, making Katsuki’s body quiver during each one.
Katsuki nods his head, letting out more muffled moans afterwards. It was a shame they had to be concealed. Dabi could only hope for a second encounter with the explosive blond just to head his sweet moans out loud.
If the train weren’t so loud on it’s own, the obscene sound of skin slapping together would be all the other passengers could hear. Somehow Katsuki relished in the idea of getting caught. It made it all the more hot. His ass getting pounded from behind by Dabi wasn’t something he was anticipating tonight, but here he was enjoying every second of it. Sure Dabi was rough as shit but that seemed to turn him on even more.
Dabi gives a few more aggressive thrusts, soon sending Katsuki over the edge and making him finish all over the floor. It was a problem on its own but Katsuki was too busy seeing literal stars to care. Dabi’s thrusts never let up either, overstimulating Katsuki’s body to the point where he had to be held up in order to not fall over. But soon enough Dabi finished too, filling Katsuki up with his cum, something he’s sure to have as a reminder in the morning.
“Don’t pass out, kid,” Dabi smacks Katsuki’s cheek lightly as he starts pulling out from inside of him, waking him up from his semi comatose state.
“Ow...,” Katsuki whines, cringing in pain as he tries his hardest to stand up straight. “Don’t ever mention this to anyone or i’ll murder you.” An empty threat, and not a lot of bite in it.
His ass is suddenly smacked, making him squeak out in pain and surprise. He turns to face Dabi on for the first time tonight, taking in his smug expression from under his hood.
“Not even for a round two? Preferably in private.”
Katsuki huffs in annoyance, but that was exactly what he was thinking of. “You’re so on.”