This is after their graduation and Deku decided to take Aizawa path of becoming a teachers in U.A while Bakugou became a pro hero fighting villains

one day Deku had just finished his class as he let them go and he then see Bakugou step into his classroom he got bit confused at first

“Kacchan? What you doing here don’t you have hero stuff to do you know the teachers doesn’t like you always sneaking inside?”

Bakugou just ignored him as he walked up to Izuku and glanced at him for a while standing front of him

“Kacchan your being weird again the other teachers could find you you gotta stop coming here!”

Bakugou eventually had enough as he stepped slowly closer and closer as Deku was backing up he backed into his desk bit flustered and nervous before he felt Bakugou lean in and place soft kiss on his lips as he mumbled into the kiss

“you talk to much Deku”