Midnight Virgin

残酷おんな情死

Also known as Zankoku onna jōshi, ざんこくおんなじょうし, Cruel Female Love Suicide, Women's Cruel Double Suicide, Cruelty of a Female's Death for Love

Chie (Sanae Ōhori), newly arrived in Tokyo, saves her friend from school, Mari (Annu Mari), from a suicide attempt. The two girls become close, eventually leading to a lesbian relationship. Their affair drifts into sadism and involvement with a bizarre sex cult.