Honami, a mother with large breasts since her student days and who has always been subjected to sexual attention from men, is highly wary of her son. Now, Honami and her son are living alone when the father is away on a business trip. The overly self-conscious mother believes her teenage son's sexual desires are directed towards her! One day, she sees her son's morning erection and thinks, "He's showing me something so lewd, and now he's excited and can do whatever he wants to me..."