Riko is busy every day, juggling her club activities and studies. But even though she's busy, she can't stop meeting older men after school and having sex. They go on dates to love hotels and have passionate, adult French kissing sex. They have lotion sex with the manager of the place where she works part-time. They have sex with their hands cuffed and are tortured with a vibrator. As Riko gets addicted to adult sex, her expression gradually becomes more sensual.