The mysterious bond between a woman named Mai, who can't escape the memories of her abusive parents, and the "Cosplayer Killer," a murderer who kills while wearing a cosplay suit.
Young at heart Akiyama is a manager at his company and has lots on his mind working at a manufacturer of washroom facilities. Naturally he relieves his day-to-day pressures and satisfies his fantasies by checking out the women he meets on his way. On occasion his fantasies combine the women (plural) that he comes across. Can he act on them?
The show blends a fascination with historical samurai armor with elements of sensuality. A gravure idol initially appears in a full replica of samurai armor, removing pieces one by one, while the show provides insights into the era and the samurai who used it.