hai guys can anybody help me find this doujin, its not long since i read it, maybe a week until month ago, i remember the doujin is about a classleader or something like that and she is dealing with some jerk in her class, and the only way stress release she could have is masturbate and flashing in the nearby park, and some jerk of her class turn out are hanging around on the park and she's got gangbanged, anybody have an idea of what doujin it is???