Honestly, I think the nicest character is Takeda. He seems to really like Yuma and I wouldn't hate him, just because he wants to have sex with Yuma. He could force her, but he didn't and everyone would be dissapointed if their girlfriend wasn't obviously into them at all, even though she was the one that suggested having sex. (Don't get me wrong I love yuri and hate het in manga in general, but Takeda seems pretty decent to me and just because he is a normal horny boy, doesn't make him an evil person). Yuma is childlish and naive, though I don't think she si a bad person, she is just completely confused about everything. Hotaru seems like a person who knows she is attractive to men, but doesn't have much confidence, when it comes to Yuma - she only knows she can use Yuma inexperience to her advantage, but she has no idea, how to express her real feelings. And when it comes to Fujiwara - I still don't know - I think that maybe he used to like Hotaru, but when he realized he is just a toy to her, he became agressive - which doesn't make it right exactly, but somehow I don't believe he is a complete bastard for no reason - but I might be wrong. :)