Kim Sae-ron had a serious DUI accident while filming the series. Abrupt cut out from the storyline from Ep. 7 is due to the personal trouble she made.
Based on webcomic "Sanyanggaedeul" by Jeong Chan(Jung Chan) (published from May 16, 2019 to December 24, 2020 via Naver).
First acting role for actor Woo Do-Hwan since he enlisted in the South Korean military on July 6, 2020. He is scheduled to be discharged on January 5, 2022.