Ep. 13: The narrative reveals the origins of Nanachi and Mitty while Riko recovers from her injuries.
Aired on September 29, 2017

This installment explores the history of Nanachi and Mitty, detailing the events that shaped their current forms and identities. The story questions the circumstances that led to their existence and identifies the individuals responsible for their transformation. Concurrently, the focus shifts to Riko, who is currently in the process of healing from the wounds she sustained. The episode balances the revelation of past traumas with the present reality of recovery, offering insight into the characters' backgrounds without resolving the immediate physical consequences of their journey.
Episodes
- Ep. 9 · Regu and Riko descend from Ouzen's Seeker Camp as Riko faces survival challenges alone.
- Ep. 10 · Regu and Riko encounter a mysterious creature in the fourth layer
- Ep. 11 · Nanachi dispatches Regu to retrieve items that might save Riko while revealing personal details.
- Ep. 12 · Nanachi reveals the Abyss's secrets to Reg while Riko dreams during recovery
- Ep. 13 · The narrative reveals the origins of Nanachi and Mitty while Riko recovers from her injuries.