Dental assistant and innocent girl 'ena' was troubled by her boyfriend's plea to have unprotected sex. One day, after a drinking party with her workplace superior 'Ozawa', they hit it off and ended up having sex, during which he came inside her. At that moment, as she felt the pulsing of his cock and the spread of his semen throughout her body, ena realized she had become someone who could only feel satisfied through creampie.