The Sound of Magic

Costume Designer

• 
  Cho Sang Kyung

Director

• 
  Kim Seong Yoon

Original Creator

• 
  Ha Il Kwon

Screenwriter

• 
  Kim Min Jeong

Main Role

• 
  Ji Chang Wook

  Ri Eul

  Main Role
• 
  Choi Sung Eun

  Yun A I

  Main Role
• 
  Hwang In Youp

  Na Il Deung

  Main Role

Support Role

• 
  Oh So Hyun

  Seo Ha Yun [A I and Il Deung's classmate]

  Support Role
• 
  Ji Hye Won

  Baek Ha Na [A I and Il Deung's classmate]

  Support Role
• 
  Hong Jung Min

  Yun Yu I [A I's younger sister]

  Support Role
• 
  Kim Bo Yun

  Kim So Hui [A I and Il Deung's classmate]

  Support Role
• 
  Im Ki Hong

  [Homeroom teacher]

  Support Role
• 
  Park Ha Na

  Min Ji Su

  Support Role
• 
  Hwang Se Hee

  Lee Na Yeong

  Support Role

Guest Role

• 
  Yoon Sa Bong

  [A I's landlord] (Ep. 1)

  Guest Role
• 
  Joo Ye Rim

  Yun A I [Young] (Ep. 1, 3-4, 6)

  Guest Role
• 
  Jo Han Chul

  [A I's father] (Ep. 1, 4)

  Guest Role
• 
  Yoon Kyung Ho

  Kim Du Sik [Convenience store owner] (Ep. 1, 5-6)

  Guest Role
• 
  Lee Sang Hwa

  [Loanshark] (Ep. 2)

  Guest Role
• 
  Yoo Sang Hoon

  [Loanshark enforcer] (Ep. 2)

  Guest Role
• 
  Park No Kyeong

  [Loanshark enforcer] (Ep. 2)

  Guest Role
• 
  Ryu Kyung Soo

  [Convenience store part-timer] (Ep. 2)

  Guest Role
• 
  Yoo Chea Myung

  Na Ji Man [Il Deung's father] (Ep. 2-3, 5)

  Guest Role
• 
  Kim Hye Eun

  Mrs. Na [Il Deung's mother] (Ep. 2, 4-5)

  Guest Role
• 
  Go Ae Ri

  [A I's mother] (Ep. 3)

  Guest Role
• 
  Choi Young Joon

  Detective Kim (Ep. 3, 5-6)

  Guest Role
• 
  Kim Ba Da

  Sergeant Park [Detective] (Ep. 3, 6)

  Guest Role
• 
  Kang Moon Kyung

  [Principal] (Ep. 4)

  Guest Role
• 
  Choi Seung Hoon

  Na Il Deung [Young] (Ep. 5)

  Guest Role
• 
  Kim Jin

  [Jogger] (Ep. 5)

  Guest Role
• 
  Lee Seung Jun

  [Teacher] (Ep. 5)

  Guest Role
• 
  Park Da On

  [Spectator] (Ep. 5)

  Guest Role
• 
  Yoo Chae Yeon

  [Spectator] (Ep. 5)

  Guest Role
• 
  Jung Ah Young

  [Spectator] (Ep. 5)

  Guest Role
• 
  Kim Kyu Na

  [Spectator] (Ep. 5)

  Guest Role
• 
  Park Seung Tae

  [Mugging victim] (Ep. 5)

  Guest Role
• 
  Hong Seo Hee

  Min Ji Su [Young] (Ep. 6)

  Guest Role
• 
  Nam Da Reum

  Ri Eul / Ryu Min Hyeok [Teen] (Ep. 6)

  Guest Role
• 
  Kim Yeon Woo

  [Student] (Ep. 6)

  Guest Role
• 
  Lee Suk Hyeong

  [Student] (Ep. 6)

  Guest Role
• 
  Lee Dong Gyu

  [Reporter] (Ep. 6)

  Guest Role
• 
  Jo Si Yeon

  [Birthday girl] (Ep. 6)

  Guest Role
• 
  Jun Joon Woo

  [Police officer] (Ep. 6)

  Guest Role
• 
  Lee Ki Seop

  [Forensics investigator] (Ep. 6)

  Guest Role
• 
  Woo Mi Hwa

  [Ha Yun's mother] (Ep. 6)

  Guest Role
• 
  Lee Ki Sub

  [Forensics investigator] (Ep. 6)

  Guest Role
• 
  Ko Ha Eun

  Ko Ha Eun

  Guest Role
• 
  Lee Jae Hak

  [Student]

  Guest Role
• 
  Jung Se Hyun

  [Student]

  Guest Role
• 
  Kim Kyung Min

  [Student]

  Guest Role
• 
  Choi Ha Won

  [Student]

  Guest Role

Unknown

• 
  Lee Min Wook Unknown
• 
  Yu Ji Wan Unknown

Bit part

• 
  Seo Ji An

  [Student #1]

  Bit part