mariko, living peacefully with her husband, has grown tired of his peculiar sexual habits. her secret desires are noticed by her playboy brother-in-law, kenta, who skillfully awakens her inner slut. mariko, persuaded by kenta's delicate and bold caresses, surrenders to his touch, melting her vagina and gradually loosening her stubborn heart and body. before she knows it, mariko convinces herself, "i was just carried away..."