Terwijl de wereld wordt bedreigd door de plotselinge verschijning van een mysterieus buitenaards moederschip, gaan de beste vrienden Koyama Kadode en Nakagawa 'Ontan' Oran door met hun leven op de middelbare school. Maar naarmate ze ouder worden, worden ze geconfronteerd met existentiële vragen, leren ze de complexiteit van de volwassenheid kennen en beseffen ze dat de echte dreiging misschien niet van bovenaf komt.
| Directing | 黒川智之 | Series Director |
| Writing | 吉田玲子 | Series Composition |
| Visual Effects | 伊東伸高 | Character Designer |
| Visual Effects | 伊東伸高 | Supervising Animation Director |
| Art | 西村美香 | Art Direction |
| Sound | Taro Umebayashi | Original Music Composer |
| Sound | あの | Theme Song Performance |
| Sound | 幾田りら | Theme Song Performance |
| Editing | 黒澤雅之 | Editor |
| Production | 鈴木貴昭 | Researcher |
| Sound | 高寺たけし | Sound Director |
| Visual Effects | 稲見叡 | CGI Director |
| Visual Effects | Satoshi Takezawa | Color Designer |
| Production | 紅谷佳和 | Producer |
| Writing | Inio Asano | Graphic Novel |
| Production | Tatsumi Yoda | Executive Producer |
| Production | Yukio Kawasaki | Executive Producer |
| Production | 沢辺伸政 | Executive Producer |
| Production | Shunsuke Muramatsu | Executive Producer |
| Production | 稲葉貢一 | Executive Producer |
| Production | Shuhei Arai | Producer |
| Production | 紅谷佳和 | Co-Producer |
| Production | 岡本順哉 | Co-Producer |
| Production | Shinya Keyamura | Co-Producer |
| Production | Ayumi Ohigashi | Co-Producer |
| Crew | Takuma Morooka | Other |
