Môsô no sukebe tsuma: Aragaenai kairaku

Original title: 妄想のすけべ妻　抗えない快楽

Directed by Hitoshi Ishikawa

When Yumeji's wife Reiko refuses his request for sex, he becomes paranoid that she is cheating on him and hires a detective. However, the detective is soon discovered by Reiko, and in turn, she hires him...