wa.
sorry guys,
i can't seem to find the manga i'm looking by using the search forum, & the others.

anyway, here's the summary:

it started with a girl who woke up her brother, but they weren't real siblings..the girl thought that the boy is not interested in girls, but then she saw his bag on the street and she saw he is with some girls..she asked what are you doing? you're not interested in stuff like that, do you? (or something like that..) and the boy answered if you don't want me to do it with them, let me do it with you.

hope someone can help me.
again.

Just because your other thread didn't get answered in one day doesn't mean you should make a new one -_-;

Patience is a virtue.