 Kim Si-eunSo-hee | So-hee |
 Bae DoonaYoo-jin | Yoo-jin |
 Jung Hoe-rynJun-hee | Jun-hee |
 Kang Hyun-ohTae-joon | Tae-joon |
 Park Woo-youngDong-ho | Dong-ho |
 Lee In-youngEun-ah | Eun-ah |
 Park Hui-eunSo-hee's Mother | So-hee's Mother |
 Kim Yong-junSo-hee's Father | So-hee's Father |
 Sim Hee-seopFormer Team Manager | Former Team Manager |
 Yoon Ga-iJi-won | Ji-won |
 Jung Soo-haJung-in / Customer Oh Joo-yeon (voice) | Jung-in / Customer Oh Joo-yeon (voice) |
 Park Yoon-heeDirector | Director |
 Choi Hee-jinNewcomer Team Manager | Newcomer Team Manager |
 Yoo Jeong-hoHead Manager | Head Manager |
 Moon Jung-woongHeadquarters Staff 1 / Customer Choi Cheol-woong (voice) | Headquarters Staff 1 / Customer Choi Cheol-woong (voice) |
| KKim Tae-yoonHeadquarters Staff 2 | Headquarters Staff 2 |
| YYoo Jae-wonCall Center Colleague Yoo-jeong | Call Center Colleague Yoo-jeong |
 Kim Hee-wonCall Center Colleague Seon-ae | Call Center Colleague Seon-ae |
 Park Seo-kyoungCall Center Colleague Park Seul-ki | Call Center Colleague Park Seul-ki |
 Kim Woo-kyumDetective Bae | Detective Bae |
| KKim Tae-woongDetective Kim / Customer Yoon Won-sang (voice) | Detective Kim / Customer Yoon Won-sang (voice) |
 Song Yo-sepChief of Criminal Division | Chief of Criminal Division |
| NNa Jong-minChief of Police Station | Chief of Police Station |
 Heo Jeong-doHomeroom Teacher | Homeroom Teacher |
 Park Soo-youngVice Principal | Vice Principal |
 Kwon Da-hamChief of Staff | Chief of Staff |
 Hwang Jeong-minSchool Vice-Commissioner | School Vice-Commissioner |
 Han Hye-jiFormer Team Manager's Wife | Former Team Manager's Wife |
| SSim Ji-anFormer Team Manager's Son | Former Team Manager's Son |
 Eom Ok-ranBar Owner | Bar Owner |
