在以下频道推出： Prime Video、Crunchyroll
第 1 季，第 1 集: A strange disease is linked to a mysterious hole leading to an underground world: the Asylum. "Sleepers" go into this world to fight strange monsters and recover unknown resources. Now, a young boy who dreams of being a hero has arrived at the Asylum.
Anime · 2023年3月25日 · 23 分钟