Seven years have passed since Ultraman Trigger protected the world from various threats. In the present, Kanata Asumi, who is a positive young man, peacefully lives together with his grandpa. One day, while delivering ordered food, he witnessed a catastrophe: Spheres from the outer space attack Earth and Mars. Motivated by saving the precious lives of the people, he merges with Ultraman Decker and joins GUTS-Select, in order to protect what's important.
| Crew | Akihiko Shibahara | Scientific Consultant |
| Writing | Yoo Nakano | Storyboard |
| Visual Effects | Masayuki Gotou | Character Designer |
| Directing | Daisuke Terai | Action Director |
| Directing | Tomonobu Koshi | Assistant Director |
| Editing | Yōsuke Yafune | Editor |
| Crew | Izumi Negishi | Special Effects |
| Art | Taro Kiba | Art Direction |
| Camera | Satoshi Murakawa | Director of Photography |
| Sound | Yoichi Sekine | Music Producer |
| Sound | Masahiro Tokuda | Music |
| Sound | Kenichiro Suehiro | Music |
| Production | Hayato Saga | Producer |
| Production | Junko Oishi | Producer |
| Production | Yusuke Okamoto | Producer |
| Production | Tsugumi Kitaura | Producer |
| Production | Masahiro Onda | Executive Producer |
| Production | Masayuki Nagatake | Production Supervisor |
| Production | Takayuki Tsukagoshi | Supervising Producer |
| Writing | Junichiro Ashiki | Series Composition |
| Writing | Toshizo Nemoto | Series Composition |
| Sound | Kenichiro Suehiro | Original Music Composer |
| Sound | Masahiro Tokuda | Original Music Composer |
| Directing | Masayoshi Takesue | Series Director |
