Nao, a wife, distrusts her husband because he has been coming home late recently and has been lacking in sex. Frustrated, she masturbates, but is not satisfied. Unable to bear it any longer, she decides to hire a detective to investigate his affair, but that alone does not remove her anxiety... She fears that her husband will leave her if things continue like this, so she tries to hold him by seducing him with sexy underwear and doing other things. After a while, Nao finds out the results of the investigation and asks the detective for a favor...