I read it a little while ago, and I want to read it again, but I don't remember the title ):

The things I remember are:
-They're two brothers living in the same house, one of them is extremely smart and quiet, while the other one is a delinquent or something.
-I'm pretty sure they go to different schools.
-The smart one is the younger one.
-And I think they used to have a close relationship, until something happened in middle school or something.
-I think this part will help the most: The delinquent brother brings in a group of friends in his room (and they're all touchy and close and stuff) and the smart brother walks in on them, and just goes into his room or something (I'm pretty sure he was upset/pissed of whatever).
-Then it turns out the younger/smart brother has been in love with him for a long time.

And that's all I remember, if anyone knows the title of this story, that would be great. Thanks.

It sounds like Libido (Minase Masara) ^^

Yeah, that's the one. Thanks!