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Kirishima smiled as he and Kaminari walked along with the rest of the squad, holding hands as usual. People questioned it sometimes, but hey, what's wrong about holding your best bros hand? Sometimes that's just what he needs, sometimes its a few kisses, on the cheek, on the forehead, impulse that Kirishima almost didn't realize he had, but hey, Kaminari didn't mind, he did the same.
He was confused when some people questioned their friendship, of course they were friends, the best ones, he thought that was obvious, but apparently not.
Why else would they cuddle all night and talk about their future, or go train together or play videogames all day?
Now, that was just a plain stupid question, especially when they've been joined on the hip since the day one, inseparable.
Kirishima really never gave it a further thought, didn't even bother questioning when Kaminari layed on his lap or gave him a kiss.
That's okay between bros, right?
And its not like he minded, Kaminari even asked beforehand and it seemed natural to want to kiss him.
That's why he was surprised when one day Kaminari brought it up.
"Eiji, I... What are we?"
The blond seemed nervous, making Kirishima pout, instantly wrapping his arms around him in the most natural way.
What kind of question was that even? Wasn't it obvious?
"We're best bros?"
Kirishima prompted, finding that he sounded unsure himself.
Kaminari didn't seem pleased with that answer, his eyes going all sad and Kirishima felt terrible but he didn't understand, just stroking blond's back soothingly.
"If we're bros, then you wouldn't mind me kissing other's? Like Sero or Bakugo?"
Kaminari asked, obviously uncertain, trying to prove some point that Kirishima couldn't find, pouting, not liking the idea in the slightest bit and not understanding why.
"I... Guess..."
Kirishima said a bit too quietly, knowing he had no right to get jealous at the idea, but in truth he never realized that Kaminari would want that, so it came like a bit of a shock.
Kaminari smiled at him, still a bit sad, obviously not finding the answer that he wanted.
"Its just a question, Ei, I wouldn't."
The blond reassured him, kissing his cheek as he did so and Kirishima relaxed almost instantly.
He didn't understand Kaminari's intentions and soon tried to forget about their conversation, but he found that he couldn't, not when the blond grew distant and started getting clingy with the rest of the class instead.
At first he thought it must've been normal for him to do that, but soon it started making him feel upset and he didn't like the feeling at all, the pure jealousy.
It was hard to ignore when Kaminari layed across Iida's lap, easily flustering him, or when he wrapped himself around Bakugo in one of his anger fits, seeing how the explosive teen relaxed just a little bit.
And Kirishima couldn't do anything but watch, and he did, for painfully long two weeks before he found himself snapping.
It was nothing, just Kaminari giving a small kiss to Jirou, nothing strange, not even on lips, but it still had him fuming and he didn't know why.
He waited for Kaminari to leave the common room and instantly dragged him behind the corner, kissing him in a way he didn't remember ever kissing him in. Usually, he was all gentle touches and slow, loving kisses, but the jealousy got the best of him and built up want he didn't know he had, passion he didn't know about.
Once they broke apart, Kirishima was crying and he didn't know why exactly, but he felt so intensely about this situation, while both of them were panting and Kaminari was clearly a mess, needing a moment to recompose himself before speaking.
"Ei? Ei, I'm sorry... I didn't... I... It didn't mean what it means with you."
Kaminari reassured the redhead, hugging him close and Kirishima could only return the gesture, making the blond feel guilty.
In truth, he's been trying to get a reaction of Kirishima and he realized he may have taken it too far without meaning to.
"Ei, shhh, its okay... I'm here... I love you... Its okay... I'm sorry, I shouldn't have..."
Kaminari comforted the other, those words slipping out and he didn't even realize with how natural it felt, making Kirishima startle and look up at him, tears running down his cheeks.
"You love me?"
The redhead asked softly, things clicking together and when Kaminari gave a timid nod, Kirishima leaned in and kissed him again, more gently this time, just like they were used to.
"Why didn't you just tell me?"
Kirishima asked softly, too oblivious to ever realize that himself. Kaminari gave him a shy smile, looking a bit away, though soon nibbling on his lip, nervous.
"I didn't think you saw me that way, that's why..."
Now Kirishima was upset again for completely different reasons.
"What? How could I not, just look at you... I just... Didn't think about it."
He admitted, feeling ashamed now for pushing the blond to go to such lenghts to confess.
That night they stayed together in Kirishima's dorm room, as they were used to, and finally found it in themselves to touch the other like they longed to for so long.
At first it was just innocent small touches, but once they both started touching the other up, it was almost impossible to stop, Kirishima admiring blond's much smaller frame and Kaminari basically drooling because of redhead's muscles, not even realizing that many muscles existed.
They kissed in heated, loving ways, needy but patient and slow, savoring every moment, and once they broke apart, Kirishima let his mouth trace Kaminari's neck, small shark nibbles leaving behind light marks and making the blond moan cutely.
By the time Kirishima marked up blond's chest in ways that would hardly be noticable the other day, but showed nicely at the moment, they were both worked up and, after a thorough conversation, they both agreed that they needed more, the endless longing unbearable.
They spent rest of the night doing gentle, clumsy loving, switching and trying all the things they always wanted to do to one another and by the time they fell asleep their bodies were sore and they felt more content than ever before.
And if they slept in a little and got scolded, or Kaminari couldn't run well even if Kirishima was gentle with him, well, then it was still more than worth it to both of them.
They've stayed by each other's sides since then for good.