Wakamiya Hono, the angelic Honyopai, visits a fiercely competitive porn DVD shop for a hidden-camera challenge. A kinky director gives her a series of missions as she poses as an employee and approaches unsuspecting adult customers, trying to arouse them without revealing the shoot. If they catch her, she must repay them with erotic service. Though embarrassed at first, she gradually takes each challenge further until the prank escalates into a very lucky day.