When you both first met, Chifuyu was quite aggressive and angry and always seemed like he wanted to hit you, but after a while he ended up becoming your friend.

Now, you both were running away from a group of bullies, after Chifuyu beat up the leader from them. The boy was smiling excitedly, he liked that adrenaline, and he liked doing it with you, since eventually he considers you his best friend.