There is a big shopping mall called "Moshu-Mall". It looks normal at first sight, but the mall is actually famous for its erotic services such as "Shoppers Ero Paradise", "Grand Oppai Square", "Tsurupeta Harenchi Garden", "Fetish Plaza", and "Viva! Hustle Park". Only some chosen people are allowed to go inside! Yes, Naoki is one of them. "Welcome to our ero shopping paradise!"