Ong Seong-wu
Choi Joon-Woo

Kim Hyang-gi
Yoo Soo-Bin

Shin Seung-ho
Ma Whi-Young

Kang Ki-young
Oh Han-Kyeol

Shim Yi Young
Joon-Woo's mother

Kim Sun-young
Soo-Bin's mother

Choi Jae-woong
Choi Myeong-jun

Moon Bin
Jung Oh-je

Jung Young-ju
Park Geum-ja

Jung Hyeon-jun
Choi Joon-Woo (young)

Yoo In-soo
Yoo Pil-Sang

Han Sung-min
Hwang Ro Mi [Soo Bin's classmate]

Kim Bo-yoon
Kwon Da-hwin

Moon Joo-yeon
Yoon So-ye

Baek Jae-woo
Go Dong