A beautiful married woman wins a spot on a hot spring tour and joins a solo getaway. Staying for free at a renowned inn, enjoying hot springs, savoring delicious meals—surely such a convenient offer comes with a catch. In truth, she's secretly joined without her husband's knowledge. Don't worry, it'll stay between us. Why not let yourself go a little more? As her inhibitions gradually fade, she slowly soaks in the hot spring, completely relaxing both body and mind.