While exploring the Abyss, Riko comes across something she has never seen before. How does this new discovery impact her?
Riko and Reg find out more about their past but the question still remains: exactly who, or what, is Reg?
Reg goes on his first cave raid! Meanwhile, Riko makes preparations to go into the Abyss to find her mother.
Ozen reveals more about the Abyss as well as the truth behind Riko's origins. What will happen when Ozen shows her true colors?
Ozen tasks Riko and Reg to survive alone outside the Seeker Camp. Do they come out alive and unscathed? Or does the Abyss have a dirty trick up its sleeve?
Reg and Riko continue their descent after they leave Ozen's Seeker Camp. Riko's mettle is tested as Reg passes out and she has to fend for herself.
Reg and Riko run into trouble deep in the fourth layer where they meet an interesting creature, but are they friend or foe?
Nanachi sends Reg on a mission to find certain items that could possibly save Riko. Meanwhile, Nanachi reveals a little more about themself.
Nanachi shows Reg the truth about the Abyss. Meanwhile, Riko has a strange dream as she recovers from her injuries.
Nanachi and Mitty's past is revealed. How did they become what they are and who is responsible for it? Meanwhile, Riko is on the mend after her injuries.