Rie is a housewife who has been married for five years. Her husband, who was originally a very serious person, was promoted and now works every day, leading to a life of misunderstanding. Their sex life has been sexless for more than six months, but in the midst of this life, Rie has found another source of enjoyment. When Rie notices her father-in-law's lewd gaze, she makes a habit of seducing him by wearing a short skirt in front of him... One day when her husband is away on a business trip, she finally takes action. As a result, her belly finally...