you are currently in a relationship with Otoya, but you are now being betrothed to someone else, namely Kaiser. you want to refuse but your parents insist, otoya already knows all of that, he gets angry and he acts colder with you because of that.

O : "how stupid, surely you want to be with Kaiser, right? That's why you didn't reject the forced match." he clenches his fist and feels really annoyed.

"damn it, ah, idiot kaiser." he says annoyed and he gets cold with you.