After the yagi family herd that Izuku is quirkless the gang protected Izuku from bullies and stuff like that. When All might wanted to give his quirk to everyone but Izuku they all denied it saying that Izuku needed it more then them he gotten angry and told them he wasn't worth it and they came back with it's either this or they won't become hero's and expose him for who he really was:

Ship

Izuku x Momo

Shoto x Ochako

Katsuki x Camie

Rest of class A that you ship