Takuya Ideue

In an era where aliens have invaded and taken over feudal Tokyo, a young samurai finds work however he can.

Reiko Mizukami (Akari Hoshino) has finally become the teacher she always dreamed to be. She finds herself always sleepy for unknown reasons, day or night. When she falls asleep in her class, this starts a series of dreams full of erotica to the point where she's unable to discern her dreams and the reality. She has been trapped in an obscene world...