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Sparring with Todoroki was always the most fun. He was able to put up the best fights, and it was hard to tell who would win or loose at any given challenge. Usually it was Bakugou, but he wasn't keeping count.
They had a training room all to themselves and kept the door locked. It could be unlocked with a key from the outside, but a simple twist of a knob from the inside, and they had all the privacy they needed. They were quiet, focused on winning, or beating each other.
Todoroki shot ice directly out of his hand towards Bakugou. He easily dodged by lurching sideways. He wasn't able to dodge the mismatched boy charging at him and knocking him onto his side onto the annoyingly blue mat when he was unprepared. He felt his hips caged in by a pair of lean legs, and hands pin both of his arms, still sideways, to the ground.
Bakugou grunted at him. "Get off, asshole. I'll kill you." He wriggled under him, trying to get to a point where he could flip their positions, and he could lead the fight again. Despite his best efforts, it seemed that Todoroki had a firm grip on him.
He shouted, and the side of his hip ground into him. "Fuck off!" He yelled. The other boy was determined.
"I want to keep you like this. You look good when you can't move." The taller boy purred into his ear.
"Pervy weirdo." He shot a glare at him as best as he could.
"As though you're not perverted too." He ground into him at the perfect angle, unable to hide the groan that left him.
"I'm not currently getting off on my boyfriend grinding his dick into my hip."
"You still like it. It's why you haven't told me to stop."
"I fuckin' thought 'get off' was pretty clear." Bakugou flipped over onto his back, expecting to gain his hands back and turn them over, but he was wrong. Todoroki still straddled him, and his hands were still clasped by his slender fingers on one hand.
"I thought you meant the other 'get off'. Oops." He said. His sarcasm was hard to miss.
The blond moaned as the taller boy's ass slotted onto his own cock. "Fuck.."
He leaned down and kissed him. He was never hesitant about making kisses dirty or sloppy, as much of a goody-goody he was. A tongue pressed against his panting mouth, and he didn't even seem to care if his chin and the sides of his lips were wet.
"I want everyone to see that you're mine." Shouto whispered, barely a breath away. He teased his lips as though he were going to kiss him again, but never gave Bakugou the satisfaction.
"O-okay." He nodded.
Todoroki's free hand slid over his throat. The danger of it went straight to his cock. It scared him how much trust he put in his rival.
"I'm sorry, what was that?"
"I said, 'okay'."
"That's not what I wanted to hear."
Bakugou gulped, and felt his finger press harder into his skin at that. "Fuck- yes. Mark me. I want to know who I belong to."
"You know you belong to me." His voice dropped an octave, and his cock twitched in his pants.
Todoroki began to suck on his neck, likely leaving delightfully dark bruises on his pale skin. They would be impossible to hide. He moved to his collar, slightly adjusting himself so that Bakugou's shirt wasn't in his way.
He sat up, hesitating. "I'm going to let go of your hands. You're not going to try anything funny, or I'll tie them up."
"Yes." Bakugou obeyed simply.
Todoroki let go slowly. When the blond didn't move, the mismatched boy removed his shirt. He ran his hands up his chest, still holding the shirt with one of them, and shoved the fabric into Katsuki's mouth.
He let out a muffled complaint, which turned into a stifled moan as Shouto bit his nipple. He ground his hips upwards.
He sucked briefly, not hard enough to leave any marks, moved above his nipple to leave scattered hickeys. One just above the tender skin, another near his armpit. Each one left Bakugou grunting or moaning. He was already so close, and he felt vulnerable under him.
He grabbed his red hair on one side, and tugged, knowing he could pull a noise from the taller boy. "Ah," he sounded heavenly. He tried to pull it again, but instead he received another hickey just under his collarbone.
He wanted to swear, but it was still muffled by the fabric in his mouth.
Todoroki moved to his stomach, which was always one of the most tender parts of him. He was still so close. The other boy practically seemed like a pro. He was good at everything he did, especially when it came to the blond. It drove him mad.
"Katsuki," he sat up, panting. "I love you." He kissed his stomach, then sucked on it, hard, and all of the tension released at once. He pulled the shirt out of his mouth and moaned loudly. He didn't care if anyone could hear him. He saw white against his closed eyes, then his hips stopped bucking and he fell to the mat again, relaxed.
"I love you too, fuck me. That felt really good." He said through gasping breaths. "Are you gonna be okay?"
"Mm.." Todoroki hummed.
Bakugou didn't like that answer. "Oi, fucker. I want you to fuck my thighs."
"Huh?"
He grabbed Todoroki as best as he could and he was thankful that he was flexible. He tugged the taller boy between his thighs, lifting his own legs over Todoroki's left shoulder. Todoroki yanked his pants down and slotted himself between Bakugou's thighs, thrusting against hard muscle and soft skin.
"Ah, Ba- Katsuki.." He moaned from the effort.
Bakugou tensed his legs, pulling more wonderful moans from him. Damn him for sounding so good too.
With a few more thrusts, Shouto came over his stomach with a grunt, and then collapsed on his side by his boyfriend.
"I always think I'm the sex-crazed one of the two of us. But it's fuckin' you, every time." Bakugou teased him.
"It's still you. Every time you win, you have to have sex with me. I've only done it once."
"There's a first for everything." Katsuki argued.