풍선껌

Lee Dong-wook

Park Ri-hwan

정려원

Kim Haeng-ah

이종혁

Kang Suk-joon

Park Hee-bon

Lee Seul

Park Cheol-min

Kim Joon-hyuk

Bae Jong-ok

Park Sun-young

Kim Jeong-nan

Oh Se-young

박준금

Yi-seul's mother

Lee Seung-joon

Kwon Ji-hoon

Park Won-sang

Jo Dong-il

Ahn Woo-yeon

Ye Joon-soo

김사권

Hong Jung-woo

김리나

No Tae-Hee

Han Seo-jin

Kim Haeng-A (7 years old)

고보결

No Dong-Hwa

Seo Jeong-yeon

Aunt Gong Joo

Yoon Chan-young

Park Ri-Hwan (15 years old)