No. of Episodes:
13
Starring :
Miyu Tomita
Mariya Ise
Maaya Sakamoto
Mutsumi Tamura
Manami Numakura
07/07/2017
Overview
Within the depths of the Abyss, a girl named Riko stumbles upon a robot who looks like a young boy. Riko and her new friend descend into uncharted territory to unlock its mysteries, but what lies in wait for them in the darkness?
Episodes