Cha Eun-sang (20 Episodes)

Kim Tan (20 Episodes)

Choi Youngdo (20 Episodes)

Rachel Yoo (20 Episodes)

Yoon Chanyoung (20 Episodes)

Kim Won (20 Episodes)

Lee Bona (20 Episodes)

Lee Hyoshin (20 Episodes)

Jo Myeongsoo (20 Episodes)

Lee Sangwoo (20 Episodes)

Kang Yesol (20 Episodes)

Kang Hanna (20 Episodes)

Moon Joonyoung (20 Episodes)

Hyojoon (20 Episodes)

Chairman Kim Namyoon (20 Episodes)

Park Heenam (20 Episodes)

Choi Dongwook (20 Episodes)

Yoon Jaeho (20 Episodes)

Jeon Hyeonjoo (20 Episodes)

Han Giae (20 Episodes)

Jeong Jisook (20 Episodes)

Hyoshin's mother (20 Episodes)

Bona's mother (20 Episodes)

Lee Changhyeok (20 Episodes)

Myeongsoo's mother (20 Episodes)

Yesol's mother (20 Episodes)

Secretary Jeong (20 Episodes)

Jeong Jihoon (20 Episodes)

Esther Lee (20 Episodes)

Lee Yoona (20 Episodes)

Student (20 Episodes)

Kim Tan (Young) (20 Episodes)

Yang Da Kyung [Kim Won's arranged date] (3 Episodes)

Yoo Kyung Ran [Young Do's mother] (2 Episodes)

Announcer (2 Episodes)

Clothing store employee (2 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Cha Eun Suk / Stella [Eun Sang's older sister] (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Self (1 Episodes)

Bo Na's brother (1 Episodes)

Prof. John S. Keating (1 Episodes)