[Sunred]

Quote:

Originally Posted by MaskedRiderAsakura

This is my take. Kusaka is just so possessive and toxic that pretty much any guy that Mari reciprocates friendliness towards is a potential future lover and thus, his competition.

Sole difference being Keitaro I guess, since Kusaka doesn't really take him seriously.

Yeah, Kusaka was pretty much what you described. And he was one of the few who could be Kaixa and not self-destruct right away so that also probably gave him a reason to be a total douche thinking they need him hate it or love it.