Located in the center of a remote island, the Abyss is the last unexplored region, a huge and treacherous fathomless hole inhabited by strange creatures where only the bravest adventurers descend in search of ancient relics. In the upper levels of the Abyss, Riko, a girl who dreams of becoming an explorer, stumbles upon a mysterious little boy.
- Year: 2022
- Country: Japan
- Genre: Animation, Drama, Action & Adventure, Sci-Fi & Fantasy
- Studio: AT-X
- Keyword: android, friendship, amnesia, post-apocalyptic future, exploration, survival, tragedy, mecha, curse, orphan, based on manga, robot, dark fantasy, seinen, anime, drastic change of life
- Cast: Miyu Tomita, Mariya Ise