Akari is a submissive masochist already trained by a man she calls Master. When he orders her to offer her adult daughter Sumire as another slave, fear of being abandoned drives Akari to obey. While Sumire is away, Akari seduces her daughter's boyfriend and loses herself in bound sex. Sumire later discovers something is wrong, is restrained and assaulted, then awakens to the same extreme desires; mother and adult daughter ultimately sink together into bondage training.