Sabage-bu!

Momoka Sonokawa is molested by a man on the train to her new middle school, but she is ultimately saved by a girl brandishing two pistols. The female is revealed to be Momoka's senior Miou Ootori, who also serves as the president of the Aogiri Academy's Survival Game Club, also known as Sabage-bu. Miou takes a fancy to Momoka after observing her skill with a gun and tries to encourage her to join the group. Momoka steadfastly refuses to join Sabage-bu, yet she unaccountably ends up doing so. Sabage-bu is not like other middle school clubs. Momoka is alarmed by the odd social manners of its members. They have a variety of characters, from the fervent to the totally deluded. They don't hesitate to bungee jump from the school building or even to go about in public while dressed in ghillie suits. When Momoka is thrown together with this group of survival game maniacs, she must find a way to cope with her unexpectedly hectic school life.