Unable to have children, Aunt Yuna hires her nephew Mitsuji to join her company, hoping to make him her successor. Kokoro is drawn to his honest and cheerful personality, and before she knows it, she begins to fall in love with him... Mitsuji is Kokoro by his aunt's bold advances and her lewd body, and before he knows it, he can't stop thinking about it. One day, Yuna approaches him lewdly, almost naked. He can't resist the sight of her lewd behavior as she seductively licks and sucks his cock...