My nephew, Keita, decided to stay at my mother's younger brother's house (Yada family) for a while because my parents were sent overseas. Keita's aunt Yukie (Minami) treats him with excessive kindness, perhaps because they don't have children of their own. Two people who have a physical relationship beyond the relationship of aunt and nephew. "Why is my aunt doing this to me?" Keita was puzzled. Yukie sees a certain man in Keita's face...