Kim Si-eun

So-hee

Bae Doona

Yoo-jin

Jung Hoe-ryn

Jun-hee

Kang Hyun-oh

Tae-joon

Bahk Woo-young

Dong-ho

Lee In-young

Eun-ah

Park Hui-eun

So-hee's Mother

Kim Yong-jun

So-hee's Father

Sim Hee-seop

Former Team Manager

Yoon Ga-i

Ji-won

Jung Soo-ha

Jung-in / Customer Oh Joo-yeon (voice)

Park Yoon-hee

Director

Choi Hee-jin

Newcomer Team Manager

Yoo Jeong-ho

Head Manager

Moon Jung-woong

Headquarters Staff 1 / Customer Choi Cheol-woong (voice)

Kim Tae-yoon

Headquarters Staff 2

Yoo Jae-won

Call Center Colleague Yoo-jeong

Kim Hee-won

Call Center Colleague Seon-ae

Park Seo-kyoung

Call Center Colleague Park Seul-ki

Kim Woo-kyum

Detective Bae

Kim Tae-woong

Detective Kim / Customer Yoon Won-sang (voice)

Song Yo-sep

Chief of Criminal Division

Na Jong-min

Chief of Police Station

Heo Jeong-do

Homeroom Teacher

Park Soo-young

Vice Principal

Kwon Da-ham

Chief of Staff

Hwang Jeong-min

School Vice-Commissioner

Han Hye-ji

Former Team Manager's Wife

Shim Ji-an

Former Team Manager's Son

Eom Ok-ran

Bar Owner

Kim Soo-yeong

Practice Room Member Soo-yeong

Lee Hwa-young

Practice Room Member Hwa-young

Yoo Jae-yeon

Practice Room Member Jae-yeon

Cho Yu-jin

Practice Room Member Min-ji

Lee Ji-ho

Practice Room Member Ji-ho

Jang Eun-jeong

Practice Room Member Eun-jeong

Oh Joong-hoon

Call Center Guide Staff

Na Won-hee

New Colleague Myeong-kyeong / Customer Koo Min-seo (voice)

Jo Ha-min

New Colleague Eun-hwa

Kang Hee-min

Call Center Agent / Customer Lee Joo-bin (voice)