She was sexually assaulted by her father-in-law for five consecutive days, starting from the Monday her husband went on a business trip. (Okuda Saki, SSIS-026)

After his mother-in-law passed away, the father-in-law, Tetsu, became single. His son, Kensuke, and daughter-in-law, Saki, invited him to live with them. The energetic father-in-law constantly stared at Saki with lewd eyes. One weekend, while Kensuke was away on a business trip, Saki, alone with her father-in-law, was pushed down by him...