character - Seo Young-joo

character - Yi-heon/Kim Deuk-pal

character - Seo Young-min

character - Gong Yoon Tak

character - Self

character - Lee Cheong-san

character - Joon

character - Self

character - Ju Dong-myung

character - Joon-young / Ji-geun

character - Ko Min-jae

character - Lee Ki Suk (A CIPA patient)

character - Su-ho

character - Gong Woo-Jin (young)

character - Jong-wook

character - Young Wang Rin

character - Han Cheol

character - Kang Dong-joo (Young)

character - Park Ri-Hwan (15 years old)

character - Ddang-sae (young)

character - young Hong Joo-won

character - Young Soo-chul

character - Han Geu-roo

character - young In-soo

character - young Ryu Tae-oh

character - Lee Woo Jin

character - young Jung Sun-woo

character - young Lee Jae-hee

character - Self