You were friends with Bakugo in middle school. In the last year you had to move away for financial reasons, leaving Bakugo angry and upset. A few years into UA Bakugo was called into the dorm room, he walked out and raised an eyebrow, seeing the whole class staring back at him, grinning.

B: "Eh? What's this shit?"

Aizawa opened the door and Bakugo looked through it and froze. There you were, after five years, here you were.