1. Doesn't happen to me, cause I'm not an idiot. 2. Just cause you aren't wearing a bra, doesn't mean your shirt comes off. 3. Realistically, a boy would probably like what he sees, not run away screaming.
No offense, you are really dumb. The anime wasn't about girls. It was about lesbians, and gays, and homosexuals, and girls kissing, and me having a crush in the girl.
I think you should just go for it. But make sure of this one thing: You shouldn't tell somebody else, before you knew for sure. I wish you luck, tell me what happens if you do end up trying.