A story of an affair between a hospital nurse and an inpatient. As they are having a secret affair in bed, they sense someone nearby and slip under the covers. The two are excited by the closeness of the closed room... and decide to have sex secretly. After the patient is released from the hospital, the woman who wants to cuckold his wife goes to his home... and seduces the man next to his wife and has sex under the covers... and the two get excited in a space where they can't move and cum inside each other many times.