That JAV

One day, Aoi and her husband, Daichi, are suddenly locked up by a mysterious man. Sagawa, a man from a construction company with whom Aoi has a relationship, Machida, a neighbor, and Teruhiro, a student whom Aoi works with, are there. The five cannot hide their agitation... Then the timer on the electronic bulletin board starts to count down with the sound of "Now you will all have sex. Aoi and Daichi have sex in front of the three, but Sagawa interferes and Aoi is left alone in the cage...