well, he didn't trust Yumi, he knew Yumi was in love with someone else.
Why does everyone want to see him with an happy ending?
He can't be with anyone else, since he's so violent... He'll end up doing the same thing with that same result.
（￣へ￣）
He probably didn't know how to deal with the fact his lover loved someone else. He couldn't leave him, so he became violent to chase his lover away. But no matter what he did, he wouldn't leave him, which probably made him love him even more, until he became afraid of actually killing him out of frustration.
I didn't think about that. Maybe you're right
I feel sorry for Kan-chan.. I think he really loved Yumi in his own way. I just don't get why he started to become so violent and aggressive when he was so sweet in high school..
Author-sana Please write a happy ending for him ╥﹏╥