I think he was jealous because he asked his brother for the number before him
Yeah, so very tsudendere-like, right? It's annoying at some point.
I really like this manga and all the characters. Ken believes that kirara is in love with his brother so he treats him badly because in a way he is angry at him. I think he tries to forget him by dating girls since he feels that he does not have a chance. Maybe after they confirm their feelings he will calm down and he will probably attack to his brother or kirara's friend as an act of jealously. I understand Ken's frustation!
i think that too(๑•ㅂ•)و✧
OMG I can't stand Ken. I don't necessarily dislike tsunderes but this is too much. Calm down dude.