Shiro is a big coward. Why can't he just be true to himself and the people around him!? He's hurting Hiro by his actions and he's using his girlfriend as a front because he doesn't know what he wants. Coward. I feel bad for Hiro, he deserve someone so much better than that sadist of a man; also the girlfriend doesn't deserve to be used and cheated on.
Ore no Kimochi ga Wakaru ka