Bakugou took his hand and led the way back to his dorm, which was a painfully long trek now that they were experiencing it. Kirishima was sluggish and confused at first with a dreamy fog over his brain, but then he fully realized exactly what was happening. They were going to his room. This was the moment they had been waiting what seemed like ages for. He started to feel light and giddy with excitement, while at the same time he had the most intense case of butterflies in his stomach as he began to feel more trepidation.

But Bakugou, he was still so manly, and commanding, so strong...and so full of fire. His entire form seemed to radiate power and energy, and the thought of it made Kirishima all weak again. In a good way, at least. But he felt desire burning in himself with equal intensity, until he was bounding up the stairs with the same energy and eagerness as Bakugou.

They paused outside of Bakugou's door only moments so he could unlock it, but the pause felt like ages. There was a blur as the door flew open and Kirishima was pulled roughly inside, then slammed against the door as it closed again. The breath was knocked out of him as his back collided with it. But Bakugou was all over him again in a second, pinning him there with his hips as he trailed kisses up and down his neck.

Soft, ash-colored hair brushed Kirishima's cheek, and firm, calloused hands slid under his shirt brazenly to feel the smooth, unexplored skin underneath. Bakugou's feverish fingers explored every ridge on his stomach slowly before winding around to hold him tightly by the hips, as if he was scared to let him go.

Kirishima maneuvered just enough to pull his shirt off over his head, and Bakugou seized the opportunity to caress his skin more freely. Feeling those hands gliding along his abs and over his chest, mixed with the feeling of Bakugou's lips on his neck sent chills across his entire body. He couldn't hold back a faint moan at the touch.

Bakugou barely held back the groan that threatened to escape in response. He knew what he wanted, and he assumed Kirishima wanted the same thing, but he didn't want to move too fast for him. Still, his hands seemed to move on their own before he could even think. His whole body felt like it was on fire. Hell, maybe it was for all he cared.

"Kat?" Kirishima breathed into his hair.

Bakugou felt his mind snap back into focus at the sound of his nickname. "What is it?"

"Do you really want to do this?"

Katsuki paused to say, "If you aren't ready, I understand."

"I am," Kirishima assured him with a wistful tone to his voice. "I want to. I just wanted to make sure you wanted to."

But Bakugou hesitated. He had started to get very riled up by his blind desire and lust and he didn't want to risk hurting his boyfriend, not if he didn't want this. Seeing his hesitation, Kirishima grabbed his hips and pulled him closer again. It was very clear how aroused he was, how much he really did want to. Bakugou could feel the fire igniting in the pit of his stomach again, though something made him hesitate still.

Kirishima grabbed his shirt and pulled him closer roughly until their lips were separated by a centimeter of space. He could feel Bakugou's bated breath on his lips, hot and desperate. Their noses brushed, and red eyes locked. Both pairs of eyes were blazing with fiery emotion and desire, made fiercer as they got lost in each other's gaze. Kirishima closed the distance between their lips for just a moment.

His breath came out in a warm gasp against Bakugou's lips as he whispered, "I want you to fuck me, Katsuki."

Bakugou's lips twisted into a smile before he kissed him and pressed him to the door again, no longer caring if Kirishima could feel how hard he was. If anything it seemed it only made the redhead more determined and desperate. Bakugou bit his lip lightly until Kirishima was forced to open his mouth and allow him inside.

As he took control Kirishima moaned into his mouth despite his best efforts to keep his voice down. But even as he melted into the kiss, he held an iron grip on his boyfriend's shirt and easily matched his intensity and passion. Standing in front of him was the man of his dreams...and he wanted Kirishima just as badly.

After a short time Bakugou got to thinking that it might be best for them to move over to the bed. Just the thought of it filled him with nervous excitement. It was a bit awkward, but he pulled Kirishima away from the door and tossed him onto the bed with a smirk on his face, though his stomach was churning nervously.

He pulled off his own shirt over his head and let out a light sigh of relief once he was rid of it. Bakugou couldn't help himself as he paused a moment to take in the sight before him. Kirishima's hair had been laying down in its natural style but now stuck out in odd tufts, looking messier than ever before. His exposed, perfectly sculpted torso was glistening with sweat-and hot to the touch. From where he sat on the bed he looked somewhat vulnerable, but Bakugou knew he was a force to be reckoned with when he needed to be.

Kirishima looked up and felt a fluttering in his chest at the sight. The fading light from the window backlit Bakugou's figure, carefully accentuating and highlighting every line along his lean but powerful frame. His body rippled with muscles, his chest heaved and body shook with every breath, and his glowing eyes looked down on Kirishima hungrily from where he loomed over him. Kirishima glanced up and down his body admiringly, then tried not to blush as his eyes fell on the obvious bulge in Bakugou's pants.

Catching Kirishima's gaze Bakugou smirked and leaned down to kiss him, slowly lowering him onto his back. It felt like a wave crashed over him and he became more forceful, straddling the other boy's hips and pressing down on him with his chest as their lips crashed together.

He could feel fingers trailing through his hair and returned the favor, using one hand to run through the bright red strands while the other lingered over the smooth skin of his torso. Everywhere that Bakugou's fingers traced felt like tiny electric shocks passing between them and across his skin, making Kirishima's skin tingle with raw energy.

They continued this way for a while, simply breathing in the scent and energy and reveling in each other's presence. But Bakugou couldn't resist for long; he ached for some form of contact. He shifted his position so that he was in between Kirishima's legs and hooked them around his hips. He broke away from the kiss to hold himself up at arm's length as he started to grind against Kirishima, then groaned quietly at the slight friction.

Bakugou watched his breath hitch and his face twist in pleasure, then smiled as he continued his movements. Kirishima seemed to be having trouble even keeping his eyes open as he got lost in the sensations, and it almost made Bakugou laugh knowing he was hardly doing anything to elicit such responses.

He felt more than saw as Kirishima started shifting slightly, and it took him a minute to realize that he was struggling to take his shorts off. With quick movements Bakugou happily helped by pausing what he was doing and standing up to pull his shorts and underwear off, tossing them aside without a second thought. He took one quick look at Kirishima before hurriedly taking off his last articles of clothing and rejoining him on the bed.

"Please..." Kirishima pleaded quietly. He was going to say more, but he was still a bit too shy for that.

Bakugou knew what he meant anyway. "All in good time," he grumbled in a deep, husky voice as he peppered his neck with kisses.

He was suddenly glad he had lied when he said he was going to hide the bottle of lube somewhere that no one would ever find it. With one hand he fished it out of the top drawer of his dresser and put a generous amount on the fingers of his other hand.

He hesitated at first, a bit nervous at the idea, then slowly moved his hand around and gently pressed a finger into Kirishima. He gasped in surprise at the intrusion but was otherwise unaffected at first. When he relaxed fully Bakugou added another finger, capturing his lips to keep him from gasping again and hopefully distracting him from the discomfort. He put every bit of his passion into the kiss, carefully gauging Kirishima's reaction with every move and ensuring that he was comfortable. Before long he was using three fingers and it didn't seem to make too much of a difference.

Kirishima focused on keeping his body as relaxed as possible despite the ache, and over time found that it actually started to feel good somehow. It felt better than he had expected, at least. The pain he could tolerate well enough and being this close and personal with Bakugou made every moment a million times better. Then all at once the fingers were gone, and Bakugou's lips left him.

"This, uh..." Bakugou's breathless voice mumbled in his ear, "This might be easier if you turn around. If you're...okay with that."

With a bright blush Kirishima wordlessly nodded and turned over onto his elbows and knees. He was embarrassed and nervous, and his stomach was all twisted up in knots, but at least his boyfriend wouldn't be able to see the blush on his face anymore. Mostly, he just couldn't believe this was actually happening.

Bakugou was nervous as well, but his anxiety melted away as he stroked himself a few times. He wanted nothing more than to force himself on Kirishima all at once, to release all the pressure that had been building within him for who knows how long and ignore any concerns for his well-being. But with every fiber of his being he resisted the urge, because weirdly enough he cared too much about him.

Despite the urge, Bakugou placed a gentle hand on his hip as he pressed inside, ever so slowly. When Kirishima gasped and his breath grew heavy he hesitated and traced tender circles over his waist with his fingers until he relaxed again. It was agonizingly slow for him, but for once he was more concerned with making sure he didn't hurt his boyfriend.

Before long Bakugou was fully surrounded in his tight heat, feeling the warmth of his skin pressed against him. At the slightest shift he could feel a wave of pleasure roll through him at the sensation, but Kirishima visibly winced at the smallest movement. He held on to a pillow with a white-knuckled grip and his eyes were squeezed shut. He couldn't seem to relax, even after a minute of staying completely still and trying to calm down. It was just too much. He was nervous, and vulnerable, and quite honestly scared out of his mind to be in this situation. Why was he doing this?

Seeing how nervous he was and how his muscles quivered with pain and hesitation, Bakugou decided to do what he could to help him relax. He bowed over his body, pressing his chest to his back and placing a soft kiss on the back of his neck. Kirishima shivered at the unexpected touch and the sudden warmth that wrapped all around his body.

"Are you okay?" Bakugou murmured into his hair as he wound a hand around to feel his chest.

Kirishima slowly began to relax at the touch, with Bakugou's gentle, caring fingers doing wonders to relieve the tension in his body. It reminded him of why he was in that situation in the first place: Bakugou made him feel things he had never felt before. He was the manliest person he had ever met, and his entire body was like something straight out of his wildest dreams. And here this perfect man was, worrying and caring for him.

"Yes," Kirishima answered as his body relaxed.

He pushed against Bakugou for good measure, sighing at the mix of pain and pleasure that coursed through him. The fingers on his chest moved lower to trace over the lines of his abs, sending more shivers along his spine while Bakugou's hot breath brushed over his neck and into his hair. Kirishima focused on the feeling of his boyfriend's chest pressed to his back, the steady rhythm of his breathing, and the furious beating of his heart.

So he didn't notice at first as Bakugou's hand slipped lower until he grasped his length, seemingly out of nowhere. Kirishima bucked his hips back in surprise, pushing roughly against Bakugou and making him groan at the unexpected wave of pleasure. There was a pause, then Bakugou drew his hips back, then forward again. Kirishima let out a little whimper but it didn't hurt nearly as much as it had before, and Bakugou's hand stroked him in time with his own movements until the pain was nothing more than a distant memory.

Waves of lust and desire crashed over Bakugou with the force of a tsunami as Kirishima started to moan with every move he made. He couldn't help himself anymore as he snapped his hips harder, and the fire burning in the depths of his stomach intensified. He never imagined it could have felt so good.

Bakugou buried his face in Kirishima's neck to silence his own moans, feverishly kissing, licking, and eventually biting to keep his own voice down. Kirishima turned his head a bit to give him more space and Bakugou happily obliged, exploring his neck to find the most sensitive spot that had him moaning the loudest.

Kirishima couldn't keep his voice down despite his best efforts. The pain was a distant and vaguely familiar feeling, but the feeling of Bakugou stroking him, inside of him, it was a mix of sensations entirely unknown to him. He was soon breathless, panting against the pillow he clutched in his hands. There was a brief pause as Bakugou adjusted his position, but his next thrust hit him just in the right spot.

"Kat!" Kirishima yelped as he was overcome with pleasure.

Bakugou must have known what caused it because he focused on hitting that spot with every thrust now and Kirishima completely unraveled because of it. He had no idea it could feel so amazing; it felt like his whole body was on fire. At the back of his mind he was vaguely aware that he kept moaning Bakugou's name loudly into the pillow, but neither of them was particularly bothered by that.

"Fuck..." Bakugou groaned against his neck.

Just hearing his own name rolling off his tongue with that beautiful sound made the experience that much better. He wasn't going to last much longer at this rate, and by the sound of it neither was his boyfriend. Bakugou bit his neck as he picked up his pace, grunting at the flood of feelings that threatened to overwhelm him.

It wasn't long before Kirishima came, loudly moaning his boyfriend's name through his orgasm. Bakugou used those delicious sounds to push him to his own release, thrusting as hard as he could into Kirishima as he felt an explosion like never before crash through his entire body and consume him.

"Fuck! Eijirou!" He cried out against his neck in ecstasy as he reached his climax.

After a few last, quick thrusts Bakugou collapsed onto his back on the bed, and the other boy followed after him with a breathless gasp. They both stared at the ceiling, struggling to regain their breath as their chests heaved in unison. They laid there together in silence for a long while with their heavy breathing as the only noise.

Soon enough Bakugou felt his thoughts beginning to clear and his breath coming back to him. He glanced at Kirishima before cautiously winding an arm around his shoulders to pull him closer and giving him an affectionate kiss on his brow. Kirishima gave him a weak smile in return.

"So..." Bakugou said softly, and a bit shyly, "...how was that for your first time?"

Kirishima chuckled despite the fact that he was still somewhat out of breath. "Honestly? Way better than I thought it would be."

"Oh really?" Bakugou asked with a smug grin on his face.

"Shuddup," Kirishima said as he swung his hand out to smack his stomach and they both laughed lightly before lapsing back into an easy silence. But after a short while he added, "You called me by my name."

Bakugou's brows furrowed in confusion. "What? Should I have called you something else?"

"No, it's fine," Kirishima answered quickly, "I just...you said you didn't feel comfortable calling me Eijirou, so I didn't expect you to."

Bakugou shrugged. "Well I guess I thought it would be weird to use your family name in that situation."

"Good point," Kirishima chuckled again. "Well anyway, I liked it."

"There's still no way I'm saying it in front of anyone else," Bakugou retorted at once, sternly.

"Fair enough," the redhead conceded with a smile. To be fair he could just imagine every single person in their friend group-or even their whole class-being utterly shocked by Bakugou calling him by his personal name. They were already amazed enough that he remembered to call him Kirishima at times. Similarly, the nickname of "Kat" would be way too personal to anyone else. Though Midoriya did call him Kacchan, which was supposedly his nickname from childhood, and it wasn't that different...

"Looks like I left you a present."

"Wha?" Kirishima asked confusedly as he was ripped away from his thoughts.

Bakugou a finger on his neck where the skin was quickly starting to darken. "Think I gave you a bruise...right here."

"Dude, you really gave me a hickey!?" Kirishima demanded as he put a hand to the spot, as if he could try to feel the bruise.

Bakugou smiled, brushed his fingers away and planted a tender kiss on the darkened skin. Brushing his thumb over it softly he murmured, "It suits you."

"Well now the whole class is going to know I'm with someone," Kirishima pouted. "And that spot is kinda suspicious too, a little behind my neck...man, Mina is gonna guess for sure."

"No they won't; your uniform will hide it," Bakugou assured him.

Kirishima muttered, "I hope you're right. I don't really care if people know we're together I guess but...I'm just not sure how to explain why I have a hickey behind my neck. And I'm definitely not excited to have one of our teachers find out...can you imagine?"

Bakugou laughed at that. Actually, outwardly, full-out laughed before saying, "Aizawa walks into the classroom to hear everyone talking about it, then just turns around and walks out because he's sick of putting up with 1-A's bullshit."

Kirishima laughed as he imagined it. That would probably be the way the situation would play out if it came up, come to think of it. He visibly cringed at the idea of having their whole class know about what they had just done.

"Well," Bakugou began firmly, pulling him out of his thoughts again, "if they try to make a big deal of it, I'll blow them all to hell and keep you to myself. This mark says that you are mine now, and I won't let anyone come between us. If they try, they die."

Kirishima felt a little chill run down his spine again at those words. Bakugou was acting a bit possessive and it sounded a little weird in a way, but he also rather liked the idea. The explosive boy just had a weird way of showing his affection...and quite honestly Kirishima was willing to embrace that part of him.

With a tired smile Kirishima said, "You have such a way with words, as usual."

Bakugou returned his smile and leaned down to kiss his neck again, making him shiver at the feeling. Kirishima closed his eyes and relaxed in his boyfriend's arms as he cherished the feeling of Bakugou's soft lips on his body. And, though it was still fairly early in the night, he ended up falling fast asleep.

When Bakugou realized he had fallen asleep he chuckled warmly. He brushed a hand over his boyfriend's chest affectionately as one thought kept echoing through his mind: I can't believe I can call this amazing person 'mine'!

Kirishima was so perfect for him he couldn't even comprehend it. He looked so gorgeous lying there in Bakugou's arms, red strands of hair flowing over the pillow in messy trails, bare chest rising ever-so-slowly with each deep breath, his charming face so vulnerable and soft compared to the usually rugged and manly exterior he tried to show. But more than that the blond boy knew he had an emotional attachment to him. It was usually hard for Bakugou to make friends, and real friends at that, but Kirishima always showed an undying faith and respect for him, always insisting on focusing on the goodness inside of him. It was sickeningly sweet and Bakugou loved every moment of it. It gave him an overwhelmingly warm feeling to be able to call this man his boyfriend.

With careful movements so he was sure he wouldn't wake his boyfriend, Bakugou leaned over the bed to grab a towel to try to clean up Kirishima's stomach. He brushed over him with slow, cautious motions, wondering how they could have made such a mess in the first place-and how neither of them had noticed for so long. But it couldn't very well be helped now. If anything he would worry about it in the morning, because frankly he just didn't care anymore.

Bakugou tossed the towel aside and gently pulled Kirishima closer to him with the arm he had around his shoulders, and his free arm he stretched over to wrap around his chest protectively. He snuggled up close to Kirishima, burying his head in the crook of his neck where the tendrils of red hair softly tickled his cheek. He took a deep breath, breathing in the scent of him to permanently burn into his memory, then let the breath out in a long sigh.

You're mine now, and I won't ever let you go, Bakugou thought as his mind drifted off. Then, snuggled up next to Kirishima with his warm scent in his mind and the sound of his quiet snoring in his ears, Bakugou soon fell fast asleep.