Kazuya admired his aunt Hana. But as he grew up, his faint feelings for her changed into the feelings a grown man has for a woman, and now that he is living with Hana and his uncle, Kazuya's feelings for her continue to grow. Every time he sees her voluptuous body and soft-looking breasts, he can't help but feel an uncontrollable lust welling up inside him... Then, one day, his uncle has to leave the house for work. One night, alone with the two of them, Kazuya's reason finally breaks down...