Misa is a strict education-focused mother who disciplines her son in front of her husband. But when her husband is away, she quickly changes her demeanor, doting on and indulging her son with overwhelming affection. She reveals sides of herself rarely seen—helping him in the bathroom, washing his body in the bath, and even becoming his erotic material when there's no porn available, engaging in mutual masturbation with him. At night, they sleep together in the same futon, embracing tightly—a hidden, intimate side of Misa only visible during her husband's absence.