Saimin ecstasy: Nozokareta seiheiki (2007)

Madoromi, a woman who wanders the night streets, is unable to sleep. She believes her sleeplessness is causing her life to move at double speed. She encounters Gulliver, who is obsessed with the delusion that his penis is shrinking and disappearing. He introduces her to the Birth Trauma Institute, hoping to help her resolve her problems. At the institute, people with trauma are undergoing treatment involving liberation through hypnotic sex. Madoromi also finds herself participating in a threesome…

Stars: Emi Kitagawa, Mayuko Sasaki, Motoko Sasaki, Tarō Araki, Mutsuo Yoshioka