S1 exclusive Mei Washio, who has a bright, kind and charming personality and the industry's highest J cup, lives with a woman and a virgin for one month! At first, he struggles with his behavior as he is not used to being around women, but he gradually opens Kokoro to Mei who is kind and devoted to him... Eventually, the virgin becomes addicted to sex and becomes so obsessed with Mei that he asks for sex every day...! Mei Kokoro accepts all of his unreasonable requests. A documentary of a dream cohabitation life!