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.
| Sound | 高寺たけし | Sound Director |
| Visual Effects | 伊東伸高 | Character Designer |
| Art | 西村美香 | Art Direction |
| Sound | あの | Theme Song Performance |
| Production | 鈴木貴昭 | Researcher |
| Directing | 黒川智之 | Series Director |
| Writing | 吉田玲子 | Series Composition |
| Sound | Taro Umebayashi | Original Music Composer |
| Sound | 幾田りら | Theme Song Performance |
| Visual Effects | Satoshi Takezawa | Color Designer |
| Editing | 黒澤雅之 | Editor |
| Visual Effects | 伊東伸高 | Supervising Animation Director |
| Visual Effects | 稲見叡 | CGI Director |
| Production | 紅谷佳和 | Producer |
| Production | Ayumi Ohigashi | Co-Producer |
| Production | Shuhei Arai | Producer |
| Production | 川崎由紀夫 | Executive Producer |
| Production | Shunsuke Muramatsu | Executive Producer |
| Production | Shinya Keyamura | Co-Producer |
| Production | Tatsumi Yoda | Executive Producer |
| Production | 沢辺伸政 | Executive Producer |
| Production | 稲葉貢一 | Executive Producer |
| Production | 紅谷佳和 | Co-Producer |
| Writing | 浅野いにお | Graphic Novel |
| Production | 岡本順哉 | Co-Producer |
| Crew | Takuma Morooka | Other |
