● This film is Park Joong-hoon and Ahn Sung-ki's second collaboration after 7 years, and it is also the fourth collaboration between the two.

● The movie's theme song "Rain and You" was composed by Fang Junxi, who was in charge of the film's music. Screenwriter Choi Seok-hwan and film company representative Zheng Seung-hye*** both wrote the lyrics. There are two versions of this song, one is the version sung by Park Joong-hoon, and the other is NoBrain's rock version.

● Korean punk band NoBrain guest-starred in the film, playing the role of East River, a rock band from the Yeongwol area of ??Gangwon Province. In addition to acting, NoBrain is also responsible for many actual performance scenes in the film.

● Cho Yong-pil's song "Where You Stop" that appears in the film is the first time that Cho Yong-pil has agreed to have his song become film music.