The story happens in the near future of Japan, where sexual activity is forbidden by law. Inuda Hikaru is an honor student whose father is an executive at Setori (Sexual Misconduct Control Bureau of the Ministry of Health, Labor and Welfare). Hikaru aspires to become like his father and finds sex unpleasant. Minase Yu is Hikaru's childhood friend who has a sharp tongue but excels in her grades. Yu is also a
