Weekend. A young salaryman named Masatoshi 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 traditional Japanese house in a moderately developed mid-sized city, where his mother-in-law warmly welcomed them. Then, the son-in-law couldn't help but gulp at the sight of his voluptuous mother-in-law.
