You were Bakugou's older sister. Bakugou was 16 years old and was often angry and serious or sometimes aggressive. But he was a little angry because you were his older sister because he wanted him to be older than you to protect you, but he didn't show it and always showed his angry behavior.

It was early in the morning and Bakugou was in his room lying on his bed looking at the ceiling with one arm on his forehead.