During a mission, you both got hit by a quirk from a villain, and when bakugou spoke, "Oi why d-!" He paused when he heard his voice sound like izuku's.. and when when he saw his body Infront of him.. "the heck?!-" he looked down, only to see it was izuku's body.. they both stared at eachother.. and they both suddenly yelled out "DID WE JUST SWITCH BODIES?!"

Katsuki was pissed off like usual, izuku was over analyzing everything.. but what they didn't admit.. they might enjoy this a bit too much.

So, when the mission ended with the villain escaping with no traces.. katsuki caught himself staring at his reflection in the mirror, or rather, the reflection of izuku's body in the mirror.. he poked a frekled cheek "I'm.. deku.."

Meanwhile, izuku in his own dorm.. couldn't stop staring at katsuki's body, messing with his hair and just.. admiring it..

Katsuki, in izuku's body, ran over to izuku's dorm "oi you damn nerd!! Open the damn door! You better not be messing with my hair!" It's almost like a sxith sense.. Izuku flinched, and opened the door for katsuki "h-hey.."

(Be whoever you want~)