Filming began October 1, 2014 and finished February 1, 2015 in Jongno, Seoul, Korea. The last scene filmed is set in the present day and involves the first time Gun-Woo (Lee Jin-Wook) sees So-Eun (Lim Soo-Jung). They meet during a New Year's Eve celebration. About 200 extras gathered for that scene.
Kwak Dong-Yeon was originally cast to play Kang Seung-Bum, but dropped out of the project and replaced by Lee Min-Ho.