Tonari no Kaibutsu-kun - Vol. 2 Ch. 5 - An Explosion in Popularity

[MangaDex]

 

[BakedBanana]

"It's because I owe him a favour!" (Page 29)

Lemme guess, this 'gang fight' Haru participated in was because he was trying to save Sasayan from some school bullies and it devolved into a full blown fight?