"Riko", who knew that her mother-in-law had fallen, came to her husband's parents' house where her mother-in-law and brother-in-law lived. Her brother-in-law, crying next to her sickbed, seems to be in poor health. But that night, Riko sees her brother-in-law raping her mother-in-law. Her mother-in-law's mother-in-law's affection was distorted because she was sick in bed. And her brother-in-law, who was disturbed by her act and got angry, violently insulted Riko.
