Clover-Kou Conflict

Kou and Clover both had a crush on the same guy once before and he needed up going out with Clover. Kou has hated Clover since themn because she stole the guy she liked even though he was gay.

It's believed that Katsuro would try to get the pair to get along being that he is more or less in the middle of their conflict (Katsuro dates Clover and is Kou's brother)