The last appearance of the great mature actress "Chisato Shoda" at Center Village! Ryoko and Akio are about to get married. The two are preparing for their wedding at Ryoko's house. But one day... Ryoko's mother, Chisato, notices something strange while taking a bath. When she opens the bathroom door, she sees Akio sniffing Chisato's panties... Akio realizes he has seen him and runs away in a panic. From that day on, the mother, daughter, and daughter's boyfriend fall into a forbidden love triangle...