We test how the body of the highly sensitive Mami Nagase will react if she holds back from climaxing to the very limit. In the morning, she masturbates with a vibrator in the makeup room, but gets angry when the director takes it away just before she climaxes. During sex with the male actor, she is teased with toys and made to hold back from squirting, and the actor ejaculates just before she climaxes. Unable to hold back any longer, Maamin secretly masturbates in the makeup room, but is stopped just before climaxing. During the final sex session, her libido explodes!