After years of raising Ataru alone, his father finally remarried. While Ataru is happy for his father's newfound happiness, he gradually begins to harbor suspicions toward his young and beautiful stepmother, Sara. He notices her incompetence in household chores, her questionable financial sense, and, most troubling, how his father secretly puts on makeup and sneaks out of the house after work. Despite wanting to preserve his father's happiness, Ataru struggles to suppress his growing doubts. As his emotions become increasingly unstable, their household teeters on the brink of a major confrontation...