Responses
You should be careful about what you say(●￣(ｴ)￣●)
No, he went to the school to become stronger in order to be the next successor of the yakuza group. So far Nanase (hakuto's twin brother) seems to be a better option for it but that is what hakuto is trying to stop -since Nanase is such an important person for him and my guess here is that it would be a bad thing for Nanase to be the next head of the yakuza-.
I like the long haired dude the most ╮(￣▽￣)╭
By the way, the story is a little bit confusing, don't you think? But that may be also because of the translation :D So the main character is from yakuza group and he was send to the school instead of his twin brother? Is that correct or I got something wrong? (￣∇￣") I read something about a twin brother here I think, but oh god, it's really hard to figure things out.