In Kamen Rider Zero-One Ep. 15: Each One’s Ending, after an intense fight against Kamen Rider Ikazuchi, A.I.M.S. discovers that the hideout of Metsuboujinrai.net is located somewhere near Daybreak Town, and they proceed to carry out an operation in the area! With the awakening of the Ark, the powers of the Metsuboujinrai.net terrorists have increased significantly, as they engage A.I.M.S. operatives in battle! Meanwhile, Aruto visits his family grave alongside the Astronaut-Type Humagear who had just lost his elder brother, Raiden. Aruto starts to think about the Humagear’s ability to have a dying wish as he is standing before these graves. Aruto receives an incoming report regarding the activities of Metsuboujinrai.net, which means that the final confrontation between humans and Humagears is about to begin!