Ok Taec-yeon

Ra Ian, an intelligent and unmarried 6th grade public service worker who wishes to open a small dumpling shop, but ends up becoming a secret royal inspector.

Kim Tae-pyeong

Han Sang-hwan

Park Bong-pal Lee Seung-woo as young Bong-pal

Kim Kyu-hwan

Kang Dong-hee

Cha Gun-woo

Jin-guk / Hyun Shi-hyuk Kang Yi-seok as young Jin-guk (Ep. 2, 5 & 10)

Han Jung-woo - Jung-woo is the adopted son of one of Song Kang-sook's ex-lovers. Eun-jo is the first person to care for him when he was a child, which creates a deep affection in him. Jung-woo finds Eun-jo at the winery 8 years later in order to be near her and declare his love for her. Jung-woo is selfless, reliable and always cares for Eun-jo. Moon Suk-hwan as young Han Jung-woo