When Mizuki visits her husband's office to return something he forgot, she is reunited with an unexpected person. The man, who is introduced to her as her direct superior, is Aikawa, the man who trained Mizuki as a sex slave in her younger days and awakened her to sex. Mizuki had made a break from her days of pleasure-filled life as Aikawa's plaything and was building a happy family with her beloved husband, so Aikawa was someone she never wanted to remember again. Mizuki tried to get through the situation by pretending to be a stranger, but...