Her husband's sexual desire had completely diminished, and Yuuko was living an unfulfilled life. One day, her nephew Atsushi decided to stay at home for a while to look for a job. When she met her nephew for the first time in three years, she found that he had grown into a full-fledged man, and his young, muscular body strongly stimulated Yuuko's thirsty lust. Although Yuuko was troubled by her relationship as aunt and nephew, one night she could not control her urges and ended up seducing her nephew...