Y/N and Bakugo went to Aldera high together, the thing was Bakugo bullied Y/N and treated them like shit. Always finding things to get under their skin and just balantly be ugly to them. It broke Y/N so they trained their quirk to the max and then attended UA. Y/N got really hot and immediately got stares from others. Bakugo clocked it on sight and realized that his bullying did nothing and changed trying to befriend Y/N.