Meeting in Secret (2014)

Original title: 美人妻白書 隣の芝は

Tamio Shibata, the wife of a career woman, and Yumi, a writer who cannot sell. The relationship between the two couples was cold. One day, Mr. and Mrs. "Shibata" with different kanji move into the room next to the apartment where Mr. and Mrs. Shibata live. Tamio Shibata, who stayed at home all day, and Asako Shibata, a housewife who became a neighbor, naturally narrowed their distance. One day, a courier arrives at Tamio. However, the package was from the Shibata family next door that the delivery staff mistakenly delivered. Tamio will deliver a courier next to him...