Seven demons suddenly appeared in Tokyo.

The demons massacred people one after another, turning Tokyo into a living hell.

However, Michel Saionji, who calls herself an exorcist, erected a barrier within Tokyo, trapping the demons.

Since then, Tokyo has been enveloped by a sacred domain that imprisons the demons.

Tokyo became forbidden territory, but many people entered out of curiosity.

However, anyone who entered the sacred domain was randomly teleported within it, and none ever returned.

Five years later, no one dared to approach anymore...

Chapter 0.

This is the story of hell's beginning.

Mizuki Yumeno and Yume Kanzaki wake up.

Both have lost their memories, and Mizuki was missing her ears.

The two strangers, mustering their wisdom and courage, begin their escape from this hell.

This is the story of Mizuki Yumeno as she becomes steeped in love and madness, and descends into darkness.