Yang Ik-june

Jung Jong-suk (voice)

Oh Jung-se

Hwang Kyung-min (voice)

Kim Hye-na

Kim Chul (voice)

Park Hee-bon

Young Hwang Kyung-min (voice)

Kim Kkob-bi

Young Jung Jong-suk / Female Karaoke Employee (voice)

Heo Ji-woong

Detective #1 (voice)

Kyung-soon

Jong-suk's Mother (voice)

Jung In-gi

Publishing Company Director (voice)

Kim Jae-rok

Home Room Teacher (voice)

Yeon Sang-ho

Lee Jeong-min / Cat / Kim Yeong Message Center / School students (voice)