I met married woman Hanase Shirakawa through a dating app, and we immediately clicked. After 15 years of marriage and years devoted to raising her child, she finally has time for meals and shopping with friends, yet her husband no longer sees her as a woman. Lonely and sexually frustrated, she begins meeting strangers online. Claiming she is visiting her parents, she slips away for an overnight hot-spring trip and unleashes all her pent-up desire in a joyful marathon of sex and repeated ejaculation.