Kenichi and his wife, Maiko, were enjoying a happy life in their apartment as they approached their third year of marriage. Then, Maiko's sister, Tomoe, came to stay at their apartment while looking for a place to live alone. Unlike Maiko, Tomoe not only had large, firm breasts but also dressed in revealing and careless outfits, leaving Kenichi unsure where to look. Tomoe exuded her sensual pheromones as she enjoyed leading him into forbidden pleasures...
