In a world consisting of numerous isles, a young hero from the Astora Isle encounters the adventurer Kyle and follows him on an expedition on the isle. They meet a mysterious girl named Iris and a talking white cat, and together they make their way to the isle's ruins, where they find a flying island. Kyle becomes consumed by darkness there, and the party resolves to travel to the ends of the world on the flying island in order to find the seven "Great Runes", following Kyle's words before he disappeared.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | The Land Protected by Light | 2020-04-06 | 25 min |
| Season 1 | Episode 2 | The World's Egoism | 2020-04-13 | 25 min |
| Season 1 | Episode 3 | The Grief-stricken Queen of Light | 2020-04-20 | 25 min |
| Season 1 | Episode 4 | The Messenger from Black | 2020-04-27 | 25 min |
| Season 1 | Episode 5 | United Front | 2020-05-04 | 25 min |
| Season 1 | Episode 6 | The Gray-Green Demoness | 2020-05-11 | 25 min |
| Season 1 | Episode 7 | Picking Wild Greens | 2020-05-18 | 25 min |
| Season 1 | Episode 8 | A Promise | 2020-05-25 | 25 min |
| Season 1 | Episode 9 | The Queen of Light and the Prince of Darkness | 2020-06-01 | 25 min |
| Season 1 | Episode 10 | The Gentle Song of Darkness | 2020-06-08 | 25 min |
| Season 1 | Episode 11 | The Distant Sky | 2020-06-15 | 25 min |
| Season 1 | Episode 12 | The Sin of the Beginning | 2020-06-22 | 25 min |
| Visual Effects | Yousuke Okuda | Character Designer |
| Production | Hiroki Asai | Executive Producer |
| Production | Ryōji Tsunoda | Supervising Producer |
| Directing | Masato Jimbo | Series Director |
| Sound | ASCA | Theme Song Performance |
| Sound | Takanori Nishikawa | Theme Song Performance |
| Art | Shuichi Okubo | Art Designer |
| Art | Kayoko Tomono | Art Designer |
| Art | Yoshimi Mineda | Art Direction |
| Sound | Hiromune Kurahashi | Sound Effects |
| Sound | Taku Iwasaki | Original Music Composer |
| Visual Effects | Miyuki Kowata | Color Designer |
| Crew | Tasuku Ishibashi | Special Effects |
