One morning, Asako visits her son's room to wake him up, but notices his morning wood. Knowing her husband is away on a business transfer, she can't help but stare at the size of her son's penis. Drawn to its massive form, she instinctively reaches out and touches it. "It's so... hard... How long has it been since I've felt this?" As the words escape her lips, she feels a throbbing desire awaken between her legs. Even during breakfast, she can't stop thinking about her son's erection. Unable to resist any longer, she asks, "Manabu... you can see how swollen my pussy is... do you notice?" Then, right there, she yanks down his pants and takes their relationship to the next level.