Mook animation

It is raining in Tokyo at night. A woman, named Kimura Yu, is caught in the rain. She has had lots of trauma in her life, because her parents were killed, and to make things worse she experiences another tragedy, her reliable councilor, Kanzaki, is killed. But Yu is "saved" by a mysterious detective named Takamizawa Kyosuke.

An erotic camping trip takes a turn for the wild when Seiya discovers a mystery mansion in the woods. Excitement turns to thrills of terror as her friends begin to disappear. Too late, they realize they are trapped in the clutches of the Black Widow, a deadly temptress who lures unsuspecting victims into a web of lust, intrigue, and murder.