A married woman's heart and body swaying in hot springs and love. After her husband confessed his desire to have her taken by another man, she reluctantly agreed despite her inner turmoil. Having only ever been with her husband, she grapples with anxiety and conflict, deciding to secretly practice physical intimacy with another man behind her husband's back. Starting with mixed-gender bathing, she hesitantly accepts advances from a man, her body responding sensitively, her aroused pussy dripping with lubrication as his cock thrusts inside, making her shiver. Though she calls it mere rehearsal, she continues to entwine with the man after dinner and again in the morning, repeatedly losing herself in passion. The married woman's hidden desires gradually blossom throughout this hot spring journey.