Three adult male student coworkers are infatuated with kind, comforting Tsubaki, a 41-year-old part-time housewife. Their long-awaited mixed-gender hot-spring trip finally arrives, and as she grows tipsy, she seems delighted to be surrounded by men bursting with love and lust. They masturbate and cum at the sight of her naked body; a serious young man's confession persuades her into ending her long dry spell; she gently teaches an adult virgin by taking his cock into her mouth; and after more drinking, she joins all three admirers in a four-way orgy. Together they unload ten shots of pent-up cum.