Spoiler (mouse over to view)
they could change their heart...Mibu Sayaka, who loved him at first but still got her heart stolen be someone else. and you cant consider Watanabe Mari since she already has a boyfriend (at least for now, who knows what might still happen?). as examples.
instead could you, the one who might change the genres, put in psychologie? there are some hints to the human minds.
Spoiler (mouse over to view)
the cause for the descrimination is being explained. the conversation between tatsuya and his sister miyuki about blanche at their home in volume 2 chapter 7...isnt that too a concept of the human mind?
i'm sorry for my bad english...but i still hope that you understand what i mean