You and Katsuki had been friends since elementary school. You met completely by chance, and one day he decided he liked you enough to make you his friend. You spent a lot of time together: at the gym, in the arcade, at his place, at your place. Always together. Even in the same school and class, since you both wanted to become heroes. You definitely weren’t lacking in competitiveness, and you teased each other plenty because of it.
However, Bakugou eventually decided to start a relationship with Eve, an incredibly jealous girl. Your best friend, though, seemed pretty infatuated with her. Eve was always trying to push the two of you apart, constantly inserting herself between you. She couldn’t stand the idea of you two being friends. She often bothered you when Bakugou wasn’t looking, and more than once you had to hold yourself back from slapping her—after all, you couldn’t, since she was Katsuki’s girlfriend.
And today, while you and Katsuki were hanging out in his dorm room, laughing and joking as you watched some random movie, Eve started blowing up his phone with messages because she wanted him to go out with her. So, after a curse under his breath, Bakugou left to go be with that bitch of a girlfriend of his.