Kim Si-eun

So-hee

Bae Doo-na

Yoo-jin

정회린

Jun-hee

강현오

Tae-joon

박우영

Dong-ho

이인영

Eun-ah

박희은

So-hee's Mother

김용준

So-hee's Father

Sim Hee-seop

Former Team Manager

윤가이

Ji-won

정수하

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

박윤희

Director

최희진

Newcomer Team Manager

유정호

Head Manager

문정웅

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

Kim Tae Yoon

Headquarters Staff 2

유재원

Call Center Colleague Yoo-jeong

김희원

Call Center Colleague Seon-ae

박서경

Call Center Colleague Park Seul-ki

김우겸

Detective Bae

김태웅

Detective Kim / Customer Yoon Won-sang (voice)

송요셉

Chief of Criminal Division

나종민

Chief of Police Station

Heo Jung-do

Homeroom Teacher

박수영

Vice Principal

권다함

Chief of Staff

황정민 (여성)

School Vice-Commissioner

한혜지

Former Team Manager's Wife

심지안

Former Team Manager's Son

엄옥란

Bar Owner

김수영

Practice Room Member Soo-yeong

이화영

Practice Room Member Hwa-young

유재연

Practice Room Member Jae-yeon

조유진

Practice Room Member Min-ji

이지호

Practice Room Member Ji-ho

장은정

Practice Room Member Eun-jeong

이종민

Gopchang Restaurant Man

오중훈

Call Center Guide Staff

나원희

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

조하민

New Colleague Eun-hwa

강희민

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

고하은

Call Center Agent

김도연

Call Center Agent

김미리

Call Center Agent

김수연

Call Center Agent

김채원

Call Center Agent

김혜윤

Call Center Agent

박현영

Call Center Agent

박현하

Call Center Agent

백서연

Call Center Agent

손진주

Call Center Agent

양아름

Call Center Agent

양연희

Call Center Agent

윤소희

Call Center Agent

윤예현

Call Center Agent

이세민

Call Center Agent

이수빈

Call Center Agent

이유송

Call Center Agent

이한

Call Center Agent

임진경

Call Center Agent

진민정

Call Center Agent

최하원

Call Center Agent

박건주

Tae-joon's Bullying Colleague

권준열

Tae-joon's Factory Colleague

차우영

Tae-joon's Factory Colleague

이승영

Tae-joon's Factory Colleague

유용희

Parking Lot Security Guard

이윤지

Female Employee on Her Way to Work

민재원

Security Guard

신호연

Security Guard

전정훈

Security Guard

박현국

Human and Net Staff

박성웅

Forensic Examiner

장인태

Funeral Staff

이채영

Redhead Trainee

손유진

Trainee

안소정

Trainee

채슬

Trainee

고은선

Chaperone Teacher

강서후

Child Going to School

권해린

Child Going to School

배서은

Child Going to School

서효원

Child Going to School

서재희

Child Going to School

이은규

Child Going to School

김기현

Dong-ho's Factory Colleague

김재범

Dong-ho's Factory Colleague

김종학

Dong-ho's Factory Colleague

남윤기

Dong-ho's Factory Colleague

서상우

Dong-ho's Factory Colleague

허건행

Dong-ho's Factory Colleague

갈재윤

Funeral Director

김진영

Technical Team Staff / Customer Cho Sang-wook (voice) / Customer Jeong Doo-wan (voice)

나예은

Jun-hee's Fan

김예나

Police Station Staff

추은경

Police Station Staff

김한샘

Detective Bae's Stand-In

문성렬

Customer Seo Jang-woo (voice)