Bakugou and Izuku had been dating since they were 12 right before Deku had moved to America. Bakugou never bullied Deku and protected him against the actual bullies. No one knew of Deku until he came to U.A. to see his boyfriend. (Jealous Kirishima)
Izuku and his mom were going back to Japan and he was planning on surprising his boyfriend of 4 years. Once he and his mom got settled into their new home he decided to go to U.A. He wanted to go and see Bakugou but didn't know where he was at the time so he asked a girl with pink hair, "Do you know where Katsuki Bakugou is?" The girl giggled but pointed him in the direction if the dorm room lounge area. He quickly thanked her before hurrying into the lounge and seeing his boyfriend yelling at some of his classmates.
Izuku smiled before calling to his boyfriend, "Hey Kacchan be nice to your friends!" Bakugou looked at Izuku about to yell at him before relizing who it was, "O.M.G. Izuku when did you guys get back!" Izuku ran to his boyfriend jumping on him and giving him a kiss. Kirishima looked at the boy in envy. Bakugou broke way from Izuku adn turned back to his friends, "Guys I would like you to meet my boyfriend of 4 years Izuku Midoriya. Izuku these are my friends Kirishima, Jirou, Denki, and Sero."
Izuku stayed with them most of the day and became friends with all of them except one: Kirishima. He was still mad at the fact that Bakugou liked someone that wasn't him but came to understand why he did but that didn't mean he couldn't be jealous.
