Hyeri (Duk Seon) and Ryu Jun Yeol (Jung Hwan) became a real life couple.
Ryu Hye-young (Bora) and Go Kyung-pyo (Sun-woo) went to the same university and are friends in real life.
This drama featured Lee Hyeri's (Deok-seon) and Park Bo-Gum's (Taek) first ever kissing scenes since they debuted.
Lee Hyeri (Deok-sun) and Park Bo-gum (Taek) became close friends during the filming of the drama.
Lee Mi Yeon, who played the adult Deok-Seon, is household name in South Korea during the 1980's.