Having forgotten his keys, Tamao Hiroi a high-school student, returns home using the back entrance and is surprised to find a stranger in his bed… Soon he realizes this is no stranger but Ran Homura, one year younger, softball ace and one of the most beautiful girls at school! Hiroi watches her masturbating on his bed and instinctively does the same peeking through the glass door. He is soon found out though and a strange ‘master/slave’ relationship begins!

Japan in the Reiwa XX era, where sexual activity is illegal. Hikaru Inuta, an honor student whose father is the director of the Ministry of Health, Labor and Welfare’s Sexual Enforcement Division, witnesses something shocking at a club he visits for the first time with her friend. There are a lot of people who enjoy sex with a great deal of alcohol and music! And among them is Inuta’s favorite idol, Misora. In front of this unusual sight, an impulse that he’s never felt runs around Inuta’s body!!