Both first and second parts were filmed simultaneously for 13 months.
This is the second time both Kim Tae-ri and Ryu Jun-yeol star in a movie together. The first film both were in is Little Forest (2018).
Second collaboration between Kim Tae-ri, Lee Si-hoon, and Shin Jeong-geun. The trio previously starred together in Mr. Sunshine (2018).
This film makes the third collaboration between Kim Tae-ri, Kim Eui-sung, and Jo Woo-jin. The trio previously starred together in 1987: When the Day Comes (2017) and Mr. Sunshine (2018) respectively.