Bakugo has bullied you since you were 7 but you weren't bullied for being quirk less, you bullied because everyone thought you were fat and messy but actually you wore about 4 layers of thick clothing so you actually had the perfect body but no one knew that until you got into UA high

Bakugo walks up to you in UA (you're both in class 1-A) and starts calling you names when the bell rings for everyone to go to the changing rooms to get ready for battle practice