An island in Japan is the site for the dumped and the refuse. Nanakusa and Yu who were childhood and school friends meet on this island that is called Kaiden, a scary name that only refers to things not normal or earthly. The reunited friends strike a bargain and are soon involved in cases most would not dare be involved in or become entangled in.
Unfortunately the movie Go Away, Ultramarine is not yet available on Disney Plus.
| Sound | Salyu | Theme Song Performance |
| Directing | Akina Yanagi | Director |
| Production | Daisuke Urano | Producer |
| Sound | Satoru Kosaki | Original Music Composer |
| Sound | Kuniyuki Takahashi | Original Music Composer |
| Writing | Minato Takano | Screenplay |
| Writing | Yutaka Kono | Original Story |
| Production | Yoshiki Terashima | Executive Producer |
| Editing | 難波智佳子 | Editor |
| Camera | Hiroki Ando | Director of Photography |
| Production | Akira Inori | Co-Producer |
| Art | Yui Miyamori | Art Direction |
| Sound | 丹雄二 | Sound Recordist |
| Art | Mori Satomi | Decorator |
