With beauty and strong pheromones that she can't control, this beautiful wife is waiting for some sexual "discipline." Yui's husband is often away on business, so she hasn't seen him in a while. One day, she is treated to cake at the neighborhood association president's house, but she spills tea on her clothes and ends up borrowing her daughter's clothes. Seeing Yui getting changed, the president becomes aroused and mischievously makes a move on her, but Yui is turned on by the president's erect penis and ends up straddling him...!