Akari lives a happy married life with her gentle husband. During his absence, she feels a slight loneliness, stemming from the unpleasant reality of living with her father-in-law. One day, noticing Akari asleep, her father-in-law uses his son's absence as an excuse to stare intently at her soft breasts and the alluring lingerie beneath. The sight of his young daughter-in-law's private parts suddenly ignites him like an aroused beast, driving him to forcefully approach her. The father-in-law's pent-up desire for the young woman under his own roof begins to violently shake the foundation of Akari's life.