The story occurs soon of Japan, where sexual action is prohibited by regulation. Inuda Hikaru is an honor understudy whose father is a chief at Setori (Sexual Unfortunate behavior Control Agency of the Service of Wellbeing, Work and Government assistance). Hikaru tries to turn into like his dad and finds sex undesirable. Minase Yu is Hikaru's cherished, lifelong companion who has a harsh tone yet succeeds in her grades. Yu really loves broadly known entertainer Uchu Misora, regularly known as Uchura. At some point, Hikaru is welcomed by a schoolmate to an obscure individuals just club where he observes people taking part in unlawful sexual demonstrations. He is likewise shocked to see Uchura, who professes to be "unadulterated" there with a man. Before he understood, Hikaru winds up being trapped in an "hidden world association" where sexual movement is performed.