Season 1
13 episodes · Jul 7, 2017
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?
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S1E1The City of the Great Pit
Jul 7, 201723mWhile exploring the Abyss, Riko comes across something she has never seen before. How does this new discovery impact her?
S1E2Resurrection Festival
Jul 14, 201723mRiko and Reg find out more about their past but the question still remains, who or what exactly is Reg?
S1E3Departure
Jul 21, 201723mReg goes on his first cave raid! Meanwhile, Riko makes preparations to go into the abyss to find her mother.
S1E4The Edge of the Abyss
Jul 28, 201723mRiko and Reg start their adventure into the Abyss, while there they run into an unexpected familiar face.
S1E5Incinerator
Aug 4, 201723mRiko and Reg descend into the Forest of Temptation. What new dangers will they find laying in wait for them there?
S1E6Seeker Camp
Aug 11, 201723mReg and Riko make it to the Seeker Camp where they meet Ozen the Immovable, the person who saved Riko all those years ago. But there is more to Ozen than meets the eye.
S1E7The Unmovable Sovereign
Aug 18, 201723mOzen reveals more about the Abyss as well as the truth behind Riko's origins. What will happen when Ozen shows her true colors?
S1E8Survival Training
Aug 25, 201723mOzen 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?
S1E9The Great Fault
Sep 1, 201723mReg 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.
S1E10Poison and the Curse
Sep 8, 201723mReg and Riko run into trouble deep in the fourth layer where they meet an interesting creature, but are they friend or foe?
S1E11Nanachi
Sep 15, 201723mNanachi sends Reg on a mission to find certain items that could possibly save Riko. Meanwhile, Nanachi reveals a little more about themself.
S1E12The True Nature of the Curse
Sep 22, 201723mNanachi shows Reg the truth about the Abyss. Meanwhile, Riko is still recovering from her injuries when she has a strange dream.
S1E13The Challengers
Sep 29, 201747mNanachi 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.