Reo, my mother's close friend who always treats me warmly, is staying over for a few days. Yuuichi instantly falls for her voluptuous figure, and every time he sees her large breasts swaying as she walks, his mind fills with lustful fantasies. Overcome by uncontrollable desire, he heads straight to the bathroom just to catch a glimpse of her gorgeous body up close. However, he notices her discarded panties in the changing area and becomes obsessed with their scent. Before he knows it, Reo catches him red-handed as she steps out of the bath, cornering him instantly. But to his surprise, she suddenly presses her bare breasts against him, taking the encounter in an unexpected and heated direction.