70.04 दृश्य
A strange disease is linked to a mysterious hole that leads to an underground world: the Asylum. "Sleepers" come to this world to fight strange monsters and retrieve unknown resources. Now, a young man who dreams of being a hero has arrived at the Asylum.
पहिलो एयर मिति : Oct 13, 2021
अन्तिम एयर मिति : Dec 29, 2021
एपिसोड : 12 एपिसोड
सीजन : 1 सीजन
रनटाइम: 24 मिनेट
स्टुडियो: Tokyo MX
देश: Japan