I could feel my father-in-law's lingering gaze... Ao stands in the kitchen in the morning. Her husband is about to leave for work, and her father-in-law is engrossed in his research, sometimes falling asleep at his desk. In their quiet cohabitation, an unsettling gaze crosses their paths. "This is my last research project," her father-in-law says, gazing at Ao with a meaningful smile as he writes down his research data. Behind the scenes, a dangerous experiment concerning memory and emotions is underway... Suddenly, Ao suffers from memory loss, and her father-in-law shows her a video. It shows the figure of 'another self' that Ao doesn't know...