A married woman's heart and body tremble on a hot spring getaway. This 25-year-old beauty, with a youthful smile, married her first boyfriend and has only ever been with her husband. Seeking new experiences, she joins this trip. As she soaks in the outdoor bath and feels the touch of a man other than her husband, she blushes with embarrassment but gradually opens her heart. Responding to his gentle, passionate caresses, her fair skin flushes red, enveloped in pleasure. The next morning, basking in the sunlight, she surrenders herself to the man—her form radiating the thrill of a newfound romance.