Colored Glasses IV: The Pleasure of Being Seen, the Ecstasy of Staring.

Unhappy with her sexless marriage, Kazumi meets a man calling himself a "procurer" at a bar, Sakurai. Unaware that Sakurai is pulling the strings behind the scenes, she begins a relationship with a passing man, Tsubakiyama, and realizes that someone is watching her actions, and even more so, that she finds pleasure in being watched. Seeking greater climaxes, Kazumi drags her female friends and even her own husband into the depths of immorality...