Yukari and her husband are forced to live with their father-in-law due to her husband's transfer. One day, while cleaning, she finds SM tools such as ropes and candles in her father-in-law's luggage. Her father-in-law notices this, but upon seeing Yukari's reaction, he realizes that his frustration is growing. ``You don't need to be scared, it doesn't seem like you aren't interested, right?'' he said as he slowly approached Yukari and tied her up.