• 
  Ju-Seon Eo

  Old man
• 
  Seon-kyu Jin

  detectivul Jo
• 
  Ji-hun Ju

  Tae-oh
• 
  Yun-seok Kim

  Hyung-min
• 
  Joong-kyung Yang

  Alumnus reunion friend (as Joong-Kyeong Yang)
• 
  Young-Woong Kim

  Jung Bong
• 
  Jung Taek-Hyun

  Kang Tae-Oh (young)
• 
  Jin-yeong Park

  Judge

• 
  Jung-Hee Moon

  Kim Soo-Min
• 
  Bong-Ryung Lee

  Kang Sook-Ja
• 
  Hae-Sun Bae

  Park Mi-Young
• 
  Jin Heo

  Oh Ji-Hee's grandmother
• 
  Jin-Mo Joo

  Song Kyung-Soo
• 
  Jong-joon Jung

  Chief of crime department
• 
  Kwon So-Hyun

  Oh Ji-Hee

• 
  Bae Hae-sun

  Park Mi-Young