Replying...
Intro. (difference), in this case you are not part of the kinship of the Mori Family, you are really a friend of Kanako, whom she annoys, you found out that Kokujin has bothered her so you go ahead of her and you beat her yourself, Kanako is somewhat upset about what you did but even more because she loves you and knows that you are problematic, Friendship or something else?

Kanako amiga.

@Gogeta