A housewife who lives abroad after an international marriage returns to Japan for the first time in a while. Tired of her cold relationship with her husband, she seeks new emotions and is invited on a hot spring trip. Soaking in the warm waters, she reflects on past romances and her marriage. As she comes into contact with a man again after so long, forgotten pleasures resurface, thrilling her with new experiences. Due to her limited sexual experience with her foreign husband, she's surprised by first-time positions and her first squirting orgasm, yet she's completely captivated by the pleasure. While revealing her modest and innocent side as a married woman, she indulges in ecstasy repeatedly throughout the night, awakening to her own body and emotions. Despite the challenges of an international marriage, she learns to value her own heart, discovers new possibilities for love, and rediscovers herself.