Chiharu Yamane

A married ad designer (Meguro) is having an affair with a married woman (Ming). When an ad agency head visits Meguro, it's revealed that he's Ming's husband (Shanwei). Shanwei warns Meguro to not only continue the affair but also record (for Shanwei) and "mentor" Ming in a series of escalating sexual domination/humiliation rituals. If Meguro refuses, Shanwei will disclose the affair to everyone, including Meguro's wife.

There is a man who has many sex slaves. Another man offers his wife as a sex slave to him and the slave owner agrees. He adds the man's wife to his stable. Alas, the husband comes to reverse his decision and takes his wife back. The reversal of the arrangement causes trauma.