Weekend. A young salaryman named Shintaro lives with his wife in a certain place within Tokyo. He rarely gets consecutive days off, so he decided to visit his wife's parents' home together. After three hours of shaking on the Shinkansen or train from Tokyo, they arrived at a medium-sized city with good urban development and a traditional Japanese house. His mother-in-law, Natsuko Koyama, welcomed them warmly. Then, the son-in-law gulped as he saw his mother-in-law's voluptuous figure.
