Hitomi Araki, married to Yuuji's frail and introverted father, has always calmly taken care of her family with a gentle demeanor. Yet beneath that kindness lies a voluptuous figure evident even through her clothes. Yuuji, increasingly drawn to her warmth, gradually develops romantic feelings for her. One day, when his childhood friend Shingo pays a visit, Yuuji witnesses Hitomi and Shingo facing each other intimately. In that moment, his heart is profoundly shaken.