On her way to school on the first day, Sonokawa Momoka, is sexually assaulted.
Surprisingly, a girl next to her, point a gun on the man who grabbed her behind!
That ia the first time Momoka's first met her new high school's survival game club.
Not long after, Momoka finds herself forced to join the club, which is full of pretty girls who carry airsoft guns everywhere.
The leader, Ootori Miou, is really enthusiastic about her survival knowledge, and oddly well-liked by the girls.
Another member, Kyoudou Maya, is a part-time model.
Will Momoka become a useful member of the club?