Weekend. A young salaryman named Shintaro lives in Tokyo with his wife and decided to visit her parents' home during an unusually long vacation. After a three-hour train ride from Tokyo, they arrived at a medium-sized city with moderate urban development, where there was a traditional Japanese house. His mother-in-law, Fujiki Shizuko, warmly welcomed them. Then, the son-in-law couldn't help but gulp as he took in his mother-in-law's voluptuous figure.
