Nhạc Trưởng Maestra: Sợi Dây Chân Lý

Hwang Bo Reum Byeol

Lee Roo Na

Park Ho San

Jeon Sang Do [CEO of Hangang Philharmonic]

Yang Jun Mo

Ma Yo Seop [Orchestra’s union leader]

Lee Shi Won

Lee Ah Jin [Horn player]

Kim Young Ah

Lee Hye Jung [Se Eum's friend]

Ye Soo Jung

Bae Jung Hwa [Se Eum's mother]

Kim Min Kyu

Kim Tae Ho [Se Eum’s assistant]

Lee Jung Yeol

Park Jae Man [Concertmaster]

Kang Ji Eun

Woo Young Seon [Jung Hwa’s doctor]

Im Se Ju

Miss Hwang [Jeon Sang Do's secretary]

Jin Ho Eun

Kim Bong Ju [Oboist]

Choi Yoon So

Go Yu Ra [Jeong Jae’s ex-wife]

Kim Hyun Jun

Go Han Gil [Jeong Jae’s friend]

Jin So Yeon

Kwon Soo Jin [Associate concertmaster]

Seo Jung Yeon

Heo Young Mi [Violinist]

Jung Sun A

Ha Young Mi

Lee Byung Joon

Oh Hyun Seok [Assistant conductor]

Jung Dong Hwan

Cha Ki Baek [Se Eum’s father]

Hwang Geon

No Ba Ha [Cellist]

Han Jin Hee

Kang In Han [Violinist]