Story

Kuroki Sana and her best friend, Ujimiya Tomo, awaken in an unfamiliar location after being afflicted by a mysterious urban legend known as "nightmares." This phenomenon causes women to fall into comas and remain unconscious, despite no medical explanation.

They soon discover they are trapped within a prison of despair, with no apparent means of escape from their predicament.

Content notes

Includes explicit scenes involving the female protagonist and other characters.