A shocking letter arrived at the studio: "Won't you please sleep with my wife?" Deeply moved by its contents, the crew member set off toward the home of Mr. and Mrs. S, using only the address provided. The husband's profound gratitude toward his wife and his desire to see her truly satisfied were feelings too intense to express in words alone. Yet, realizing he could not fulfill her needs by himself, he earnestly wished for a male actor to fulfill that role in his place. Accepting the husband's heartfelt plea, the camera captures every moment in complete secrecy. The fourth installment of the series brings an exciting new development.