Together with her humanoid friend Reg, a young girl named Riko hopes to one day solve the mysteries surrounding the endless chasm known as the Abyss.

Two teens in a "perfect" relationship keep a dark secret: they've agreed to use each other because they cannot be with the ones they truly want.

30,000 Japanese players trapped in MMORPG, unable to log out. Veteran gamer Shiroe leads exploration of this new reality, negotiating with NPCs to bring order to the virtual city of Akihabara.