Yuu lives with her husband and her father-in-law, who requires constant care. Exhausted from the burden of caregiving, Yuu grows resentful toward him and keeps her distance. Soon after, her father-in-law suddenly dies. Overwhelmed by deep regret, Yuu is devastated—until several days later, the supposedly dead man regains consciousness. Whispering, "I want to see sex... I want to see sex," he sets in motion a forbidden relationship between them. Amid the fractured atmosphere of a household shattered by death, Yuu begins reevaluating her bond with her husband while simultaneously grappling with new, conflicting emotions toward her father-in-law. Caught in a whirlwind of desire and guilt, she gradually rediscovers her true self.