Okay this Manga is about twins with different personalities. One is super cool and the school idol while the other one is shy and a loser. The main character girl befriends the shy one and he asks her to help him be more out going. The firstly chapter ends with the shy boy asking the girl to go 2 the roof to eat lunch. The girl gets there and it turns out the cool twin was pretending to be the shy twin and threatens the girl to stay away from this brother. Thanks!! I believe there is only one chapter scanlated so far.

Sounds like Hoshigami-kun wa Douka Shite Iru. Unfortunately there's still only one chapter scanlated. It seems like the group kinda dropped this manga since they're too busy with the release of Tsubaki-chou Lonely Planet. :-/ Too bad though, the first chapter was really cute, I was hoping to read more of it...