Kwak Dong-yeon

Artist Nu-ah

Jang Han-seo

Kwon Ki-do

Na Hae-jun, the heir of a five-star hotel called Guseong Hotel, which is located right across the street from Paradise Inn. He is the head of its strategic planning department.

Jeong Ha-rang

Oh Se-ho

Jason, a 28-year-old psychiatrist who is Soo-ho's high school classmate and personal doctor.

Yeon Woo-young

Kim Byung-yeon (ko) Noh Kang-min as young Byung-yeon

Gong Jung-in – Gong Ji-man's son

Lee Yong-joo (Park Tae-ha's prison mate)

Young Han Gi-tak

Yi Ui-rip

Young Jung-tae

Choi Jung-woo Baek Sung-hyun as adult Choi Jung-woo Kim Kyung-min as middle school student Choi Jung-woo (ep 1) Lee Joon-myung as elementary school student Choi Jung-woo (ep 1)

Young Lee Hoon