Disguised as GUYS member Mirai Hibino, Mebius, a young rookie Ultraman, is sent by Ultra-Father to defend Earth from monsters and aliens, new and old, and even gets occasional help from the older Ultramen.

While the Subordinate weeped, Mirai informed him that Ryu was alive, saved by the power of Ultraman King. He revealed that after Alien Emperor's defeat, Armored Darkness had been known for some time and Ultraman Hikari was sent by Ultraman King to destroy it before it could reach Earth, but the Armor's strength overpowered him and possessed him.

The first of a 2-part sequel to the 2006 TV Series Ultraman Mebius. After the death of Alien Empera, the sentient being known as Armored Darkness is activated to carry out the Emperor's Plan B. To make its presence known, Armored Darkness revives the monsters Saramandora, Roberuga, Mukadender, and Cherubim.

On her 16th birthday, Asagiri Kanna, a shy and bullied girl is abducted and taken to attend a new school. There she finds out she has been promised to marry the demon king, Kaki Kitou. Neither of them seem to be happy about it.