The city "Cynthia" on the edge of the abyss, the "missing" girl who didn't know where she came from began to step into the abyss. Experience the complex emotional, mysterious biological environment under the Abyss. Finally face the deepest darkness of the abyss.

The city "Cynthia" on the edge of the abyss, the "missing" girl who didn't know where she came from began to step into the abyss. Experience the complex emotional, mysterious biological environment under the Abyss. Finally face the deepest darkness of the abyss.