Help

It's a shojo manga. The girl mc has a brother and she was in love with him but the brother died. The girl enrolled in the school her brother used to go to. In that school the smart ones and the stupids ones have separate buildings.
In what i remember the girl end up with a quite and long haired guy

I want to read it again but i can't remember its title. I hope you can help me find this one. I read it long ago, this is all i can vaguely remember.

Plzzzzz help. Love lots hohoho