Vol.1: Kiyu is a teacher who loves teaching but can't stand her boss. Unable to take his rants, she drinks at a bar and ends up throwing up in an alley… And that's where she meets a runaway. Unable to bring herself to not help him, she takes him home. However, it turns out he's a hardcore sadist… Vol.2: Kiyu and Akasa have been living together since she took him in three months ago. However, one day, Akasa leaves to go back home. He still continues to have lots of S&M fun with Kiyu, but he hasn't put his dick in her ever since he left, and it worries her...