Naoya, her nephew, had a faint first love for his aunt Minami since he was a child. That affection should have disappeared when Minami got married. But... while staying at his aunt and uncle's house temporarily until a new house is found, the love that should have disappeared comes back to life. Naoya, who can't give up on his first love, spends his days comforting himself with Minami's underwear. However, finally, Naoya's actions are discovered by Minami...