Bae Suzy
Seo Dal-mi (16 eps)
Nam Joo-hyuk
Nam Do-san (16 eps)
Kim Seon-ho
Han Ji-pyung (16 eps)
Kang Han-na
Won In-jae (16 eps)
Kim Hae-sook
Choi Won-deok (16 eps)
Kim Do-wan
Kim Yong-san (16 eps)
Kim Won-hae
Do-san's Father (16 eps)
Song Sun-mi
Cha Ah-hyun (16 eps)
Yoo Su-bin
Lee Chul-san (16 eps)
Seo Yi-sook
Yoon Seon-hak (16 eps)
Kim Hee-jung
Do-san's Mother (16 eps)
Kim Joo-heon
Seo Chung-myung (16 eps)
Stephanie Lee
Jeong Sa-ha (16 eps)
Cho Tae-kwan
Alex Kwon (16 eps)
Uhm Hyo-seop
Won Doo-jung (16 eps)
Yeo Jin-goo
Jang Young-sil (voice) (16 eps)
Lee Min Ryung
Yi-soo (16 eps)
Bret Allan Lindquist
2STO Employee (2 eps)
Shin Dong Hoon
Investor (1 eps)