Mio has been trained by her boyfriend to be a submissive masochist. However, the training has gone too far and she has evolved in an unexpected way. "Please make me feel even better. I'll do anything," she says, continuing to stimulate his penis even after he has ejaculated. Unable to control herself, her boyfriend orders her to "go and do it with another man." The man, who met her for the first time, is initially pleased by the woman's hard work, but becomes a masochist due to her high level of slutty behavior. Can the men withstand the torture of this innocent woman?