A story of the bonds between those who fight, in a world pushed to its limits. On one of the countless parallel worlds that exist throughout spacetime, humanity has fought a decades long war against the BETA, hostile extraterrestrial invaders, using humanoid fighting machines called Tactical Surface Fighters. This is a story of how humanity lives and dies while on the brink of extinction...

A nameless man who is six times more afraid of ghosts than the average person gets swept up with the supernatural. The trouble begins when he crosses paths with Mechako, a fearless girl who runs the Kaiki-gumi, an organization that polices the supernatural. Mechako ropes him into helping her revive the organization. Hilariously strange events and spooky shenanigans abound!