It is based on the novel of the same title by Jung Kyung-yoon which was first published in 2013, which was then serialized into a webtoon comic by KakaoPage in 2015.

His world is shaken when, one day, his highly capable secretary, Kim Mi-so (Park Min-young), announces that she is resigning from her position after nine years.

[22] The first script reading was held on April 10, 2018, at Studio Dragon in Sangam-dong, Seoul, South Korea.

[26][27] The press conference for the drama was held on May 30, 2018, at the Times Square in Seoul with the attendance of the main cast and crew.

[37] Thailand will produce an adaptation of the series titled Dear My Secretary and is set to premiere in 2025.