Rui, who had been interested in bondage for some time, came into contact with an SM circle through SNS. - He ends up undergoing bondage at the studio, and takes his reluctant best friend Mamiko with him, but the circle turns out to be an extremely dangerous criminal group. - With Rui tied up, Mamiko is invited to try it too. - In front of Mamiko, who is lightly tied up, Rui is made to drink an aphrodisiac and becomes strange, and the men take off her clothes and torture her with pleasure... - Mamiko felt something strange when she saw this scene, but it was too late...