A boy grows up behind the safe walls of an apocalyptic Japan full of monsters. Tokyo flourishes as a paradise, while outside the walls of hell dangers lurk. However, a small group searches for heaven.
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| Title | Name |
|---|---|
| Season 1, Episode 1 | Heaven and Hell |
| Season 1, Episode 2 | Two Confessions |
| Season 1, Episode 3 | Kiriko and Haruki |
| Season 1, Episode 4 | Kuku |
| Season 1, Episode 5 | Day of Fate |
| Season 1, Episode 6 | 100% Safe Water |
| Season 1, Episode 7 | The Immortal Order |
| Season 1, Episode 8 | Their Choices |
| Season 1, Episode 9 | Children of the Nursery |
| Season 1, Episode 10 | The Walled Town |
| Season 1, Episode 11 | The Test Begins |
| Season 1, Episode 12 | Outside of the Outside |
| Season 1, Episode 13 | The Journey Continues and Begins |