Shota, a nephew, has come to help his aunt Ran, who is now living alone after getting divorced, tidy up her house. As he prepares for bed, determined to do his best tomorrow, he hears Ran's lewd moans, something he's never heard before, from the back room. He thought Ran was a perfect aunt, beautiful, kind, and good at cooking... But now he hears her sweet, seductive voice... Shota wakes up in shock and heads to the living room to check on her.