Yu, a mother-in-law who was suddenly able to do it because of her father's remarriage. Ryota, who is always smiling and has an attractive body, is absorbed in him. However, the opponent is his father's second wife. She had given up on her unrequited love, but suddenly a chance came. His father will be away from home for three days on a company trip. He can't afford to pass up a once-in-a-lifetime opportunity. Ryota, who had been alone with her for a long time, attacked Yu somehow to make him turn around.
