Tomoko (41) has spent 20 years of marriage dedicated to her family as a mother of three. Her eldest daughter recently married and had a child, making Tomoko a grandmother. Living in a large household with her daughter's family, she has spent years solely focused on her role as a mother. Yet deep inside, she longs for just a brief moment to forget her family duties. After decades of selfless devotion, she yearns to cherish herself as a woman, just for one day. Despite knowing it's dangerous, she takes that first step forward—onto a path from which there's no turning back. On a trip with a man she's just met, she surrenders her body and heart to him in an outdoor hot spring. As her arousal builds, her pale skin flushes red. In that fleeting moment, she loses herself completely, surrendering only to sensation.