Ultraman Mebius & Ultraman Brothers DVD (Japanese Movie)

20 years ago, Ultraman, Ultraseven, Ultraman Jack and Ultraman Ace fought U-Killersaurus, an extremely powerful monster that Yapool, who had returned, had created and taken the form of. Together, they knock the beast into the sea, but in order to stop him for good, they seal him away, sacrificing their ability to transform. They take up jobs to be in the area of Kobe to live their rest of the lives, as humans.

20 years later, Mirai Hibino travels to Kobe as a investigation. There, he meets Aya Jinguji, an oceanographer who is part of GUYS, and befriends her and meets her brother, Takato Jinguji who says that he hates team GUYS and Ultraman. Aya explains that 3 months ago, him and his pet dog, Art, were attacked by a Cherubim. This event traumatised him, as he felt powerless as Art was injured by the monster and also by the fact that team GUYS or Mebius did not come to save him. Art miraculously survived the incident, but Takato no longer wanted to take care of him.