Behind-the-scenes footage of mobile phones

The film was shot on a large scale in downtown Seoul, which is a rare scene in Korean movies, and the chase scene was shot in one shot after the rehearsal. In a scene in the film where the male protagonist is chased by detective Son Hyun-joo, Son Hyun-joo did not worry about his body during filming and jumped into the Cheonggyecheon River to complete the filming. Although Uhm Ji-won has been in the industry for many years, the enthusiasm she felt from Son Hyun-joo and the staff during the filming of the film made her feel the same as when she first debuted on the set.