| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Kim Sang-hyub | Crew | Directing | Director | 16 |
Lee Si-eun | Crew | Writing | Writer | 16 |
 Yaongyi | Crew | Writing | Original Story, Creator | 16 |
Jang Jung-do | Crew | Production | Executive Producer | 16 |
Park Se-jun | Crew | Sound | Sound | 16 |
Kim Young-kyu | Crew | Production | Executive Producer | 16 |
 Lee Han-wi | Cast | Actor | Min Jae Joon [Plastic surgeon] | 1 |
 Jeong Jun-ho | Cast | Actor | Lee Joo-hun | 16 |
 Kim Byung-choon | Cast | Actor | Vice-principal | 16 |
 Lim Hyun-sung | Cast | Actor | Comic Store Owner | 16 |
 Kim Jung-hak | Cast | Actor | Mr. Oh | 16 |
 Moon Ga-young | Cast | Actress | Lim Ju-kyung | 16 |
 Woo Hyeon | Cast | Actor | [Camp ground owner] | 1 |
 Lee Tae-ri | Cast | Actor | Wang Hyun Bin [Joo Gyung's crush] | 1 |
 Lim Se-mi | Cast | Actress | Lim Hee-kyung | 16 |
 Oh Eui-sik | Cast | Actor | Han Joon-woo | 16 |
 Kang Min-ah | Cast | Actress | Choi Soo-a | 16 |
 Koh Woo-ri | Cast | Actress | Selena Lee | 16 |
 Kim Jae-hwa | Cast | Actress | [Music teacher] | 2 |
 Park You-na | Cast | Actress | Kang Soo-jin | 16 |
 Cha Eun-woo | Cast | Actor | Lee Su-ho | 16 |
 Seo Sang-won | Cast | Actor | Doctor Kang [Soo Jin's father] | 4 |
 Lee Go-eun | Cast | Actress | Lim Joo Gyung [Young] | 4 |
 Kim Hye-yoon | Cast | Actress | Eun Dan Oh [Movie goer] | 1 |
 Kang Chan-hee | Cast | Actor | Jeong Se Yeon [Su Ho & Seo Jun's friend] | 5 |
 Park Ho-san | Cast | Actor | Lim Jae-pil | 16 |
 Kim Young-dae | Cast | Actor | Oh Nam Joo [Man at Namsan Tower] | 1 |
 Ahn Sang-woo | Cast | Actor | Disciplinary Teacher | 16 |
 Jeon Hye-won | Cast | Actress | Park Sae-mi | 16 |
 Seo Hye-won | Cast | Actress | Se-mi's Friend | 16 |
 Jang Hye-jin | Cast | Actress | Hong Hyun-suk | 16 |
 Ok Joo-ri | Cast | Actress | [Neighborhood woman] | 1 |
 Jung Gun-joo | Cast | Ryu Hyung Jin [Baseball player] | 1 | |
 Hwang In-yeop | Cast | Actor | Han Seo-jun | 16 |
 Lee Jae-wook | Cast | Actor | Baek Kyung [Movie goer] | 1 |
 Dayoung | Cast | Actress | Chen [Move Entertainment celebrity] | 2 |
 Geum Gwang-san | Cast | Actor | [Sung Yong's father] | 1 |
 Park Young-soo | Cast | Actor | [Columbus Park] | 2 |
 Yoo Ok-joo | Cast | Actress | [Angry customer] | 1 |
 Cha Yeong-ok | Cast | Actress | [Neighborhood woman] | 2 |
 Terris Brown | Cast | Actor | [English teacher] | 1 |
 Hwang Jung-ha | Cast | Actor | Byeon Joon Hyeok [Yongpa High student] | 4 |
 Shin Jae-hwi | Cast | Actor | Lee Sung Yong [Yongpa High student] | 5 |
 Song Hoon | Cast | Actor | [History teacher] | 2 |
 Kim Min-ki | Cast | Actor | Lim Ju-young | 16 |
 Jung Dae-Ro | Cast | [Hee Kyung's acquaintance] | 2 | |
 Lee Jae-eun | Cast | Actress | [Su Ho's housekeeper] | 1 |
 Choi Yi-sun | Cast | Actor | [Yongpa High student] | 1 |
 Paul Battle | Cast | Actor | [Doctor] | 1 |
 Lee Woo-je | Cast | Actor | Kim Cho-rong | 16 |
 Yoon Seo-ah | Cast | Actress | Young Im Hee-kyung | 16 |
 Park Hyun Jung | Cast | Actress | Lee Mi Hyang [Seo Jun’s mother] | 5 |
 Choi Da-young | Cast | Actress | [Reporter] | 1 |
 Yoon Jeong-sub | Cast | Actor | [Joo Hun's assistant] | 2 |
 Joo Se-Bin | Cast | Actress | Jin Hee Jung [Seobom High freshman student bully] | 1 |
 Lee Il-jun | Cast | Actor | Yoo Tae-hoon | 16 |
 Kim So-bin | Cast | Actress | Classmate | 16 |
 Lee Sang-jin | Cast | Actor | Ahn Hyun-gyu | 16 |
 Yeo Joo-ha | Cast | Actress | Han Go-woon | 16 |
 Lee Eun-joo | Cast | Actress | [Move Entertainment team leader] | 2 |
 Lee Byung-Jae | Cast | Actor | [Seo Jun's band member] | 2 |
 Jo Yoon-Soo | Cast | Actress | [Student] | 1 |
 Oh Yu-jin | Cast | Actress | Joo Hye-min | 16 |
 Go Han-min | Cast | Actor | [Photographer] | 2 |
 Jang Young-hyeon | Cast | Actor | [Convenience store friend #1] | 1 |
 Kwon Ban-seok | Cast | Actor | Dr. Han Chae Hoon [Emergency room doctor] | 1 |
 Park Ji-ho | Cast | Actor | [Baseball game spectator] | 1 |
 Han Yi Young | Cast | Actress | Ha Ji-young | 16 |
 Kim Ji-su | Cast | Actress | [Wedding shop staff] | 1 |
 Kang Cho-won | Cast | Actress | [Saebom High student bully] | 4 |
| Person | Type | Job | Role(s) | Episodes |
