I read it before but I want to read it again.

A girl who isn't very popular at school ends up gaining three new step brothers I think? After her dad
remarries. The oldest one works at a lingerie shop and she loves him but he ends up being a bad boy.
She then starts becoming more noticeable at school and her one girl friend who sticks up for her and likes the girls brother's friend introduces her to a male friend and she goes over to his house where he
ends up inviting other guys over where they try to rape her but her step brothers and their friend end up
rescuing her but when she gets home she cuts herself in the shower.....

That's all i remember! If you know the title for it I would really appreciate it! I've been searching for it on every manga site I can even googling a similar topic but nothing.

Thank you!

Ubukawa - Hajimete no Kare