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.

Staz is a vampire from the surreal "Demon World", and Fuyumi, an ordinary girl, accidentally wanders into the Demon World through a portal. Subsequently after meeting each other, Fuyumi is killed by a carnivorous plant and turned into a ghost, causing Staz to take responsibility and pledge to help bring her back to life.