After graduating from a famous women's college, Rumi Shimaoka has been working as a private detective since she was a child.He has a strong sense of justice and is empathetic.Perhaps because she is young, she is a woman with a temperament that puts her neck into every incident regardless of danger.One day, she received a consultation that her daughter had not returned to her house after joining the development seminar.In order to investigate, she joined, but it was a terrifying succubus mansion where obscene and dubious treatments were given and brainwashed.