Bae Doona Yu-jin Kim Si-eun So-hee Jung Hoe-ryn Jun-hee Kang Hyun-oh Tae-joon Bahk Woo-young Dong-ho Park Hui-eun So-hee's Mother Kim Yong-jun So-hee's Father Sim Hee-seop Former Team Manager Choi Hee-jin Newcomer Team Manager Yoo Jeong-ho Head Manager Hwang Jeong-min School Vice-Commissioner Park Su-young Vice Principal Heo Jeong-do Homeroom Teacher Kim U-kyum Detective Bae Park Yoon-hee Director Song Yo-sep Chief of Criminal Division Han Hye-ji Former Team Manager's Wife Kwon Da-ham Action Officer Eom Ok-ran Supermarket Owner Jung Soo-ha Jung-in Yoon Ga-i Ji-won Bae Doona Yu-jin Kim Si-eun So-hee Jung Hoe-ryn Jun-hee Kang Hyun-oh Tae-joon Bahk Woo-young Dong-ho Park Hui-eun So-hee's Mother Kim Yong-jun So-hee's Father Sim Hee-seop Former Team Manager Choi Hee-jin Newcomer Team Manager Yoo Jeong-ho Head Manager Hwang Jeong-min School Vice-Commissioner Park Su-young Vice Principal Heo Jeong-do Homeroom Teacher Kim U-kyum Detective Bae Park Yoon-hee Director Song Yo-sep Chief of Criminal Division Han Hye-ji Former Team Manager's Wife Kwon Da-ham Action Officer Eom Ok-ran Supermarket Owner Jung Soo-ha Jung-in Yoon Ga-i Ji-won