Yamato Yura arrives at her new high-school dormitory and makes friends right away-- her cute roommate Sonora, and Sonora's friends Karira and Honoka. However, these girls all seem to have model air-guns, and, before Yura knows it, they've convinced her to join a club called C-cubed. Only after joining does she fully understand the meaning: Command, Control, and Communication. C-cubed is a club for people into survival games! Will little Yura really be able to handle herself among her new friends?