On a remote island live the citizens of Orth, a city on the edge of a colossal pit known as the Abyss. With otherworldly creatures, ecosystems, and treasures adding to the mystery of this strange ...

An old man speaks of a golden city that lies within a devouring abyss somewhere in uncharted waters. One explorer may be the key to finding both. Riko, Reg and Nanachi take their first steps into the ...

Nanachi shows Reg the truth about the Abyss. Meanwhile, Riko is still recovering from her injuries when she has a strange dream. Nanachi and Mitty's past is revealed. How did they become what they are ...