Sumire travels with her husband to a hot spring inn for a romantic getaway. A wife struggling with child-rearing and a husband overwhelmed by work—this trip was meant to heal their exhaustion. But Sumire has a secret plan: to reignite the passion in their marriage. Sensing their relationship growing cold, she begins her seduction of Yuji the moment they arrive at the inn. Her battle to win back intimacy starts immediately. This is the story of warmth and passion reuniting, marking a new beginning for a married couple.