- ??? - Choi Soo-a
- Lee Woo-je - Kim Cho-rong
- Yoon Seo-ah - Young Im Hee-kyung
- Jeon Hye-won - Park Sae-mi
- Yeo Joo-ha - Han Go-woon
- Lee Il-jun - Yoo Tae-hoon
- Lee Joo-Ahn - Choi Man-shik
- ??? - Ahn Hyun-gyu
- Kim Hyun-Ji - Kim Si-hyun
- Han Yi Young - Ha Ji-young
- ??? - Lee Joo-hun
- Seo Hye-won - Se-mi's Friend
- Kim Ryul-Ha - Kim Ga-young
- Oh Yu-jin - Joo Hye-min
- Ahn So-Rim - Lee Ye-rim
- Ahn Sang-woo - Disciplinary Teacher
- Kim Byung-choon - Vice-principal
- Koh Woo-ri - Selena Lee
- Park Sung-Jin - Yoo Gang-hyeon
- Kim So-bin - Classmate
- Oh Chae-eun - Woo-hyeon's Girlfriend
- Ok Joo-ri - [Neighborhood woman]
- Choi Yi-sun - [Yongpa High student]
- ??? - Wang Hyun Bin [Joo Gyung's crush]
- Cha Yeong-ok - [Neighborhood woman]
- Hwang Jung-ha - Byeon Joon Hyeok [Yongpa High student]
- Kang Chan-hee - Jeong Se Yeon [Su Ho & Seo Jun's friend]
- Lee Go-eun - Lim Joo Gyung [Young]
- Shin Jae-hwi - Lee Sung Yong [Yongpa High student]
- Jang Young-hyeon - [Convenience store friend #1]
- Moon Hak-Jin - [Convenience store friend #2]
- Park Hyun Jung - Lee Mi Hyang [Seo Jun’s mother]
- Song Hoon - [History teacher]
- Kim Hye-yoon - Eun Dan Oh [Movie goer]
- Lee Jae-wook - Baek Kyung [Movie goer]
- Joo Se-Bin - Jin Hee Jung [Seobom High freshman student bully]
- Joo Se-Bin - Jin Hee Jung [Seobom High freshman student
- Kim Jae-hwa - [Music teacher]
- ??? - Doctor Kang [Soo Jin's father]
- Yoo Dam-Yeon - [Soo Jin's mother]
- ??? - [Sung Yong's father]
- Lee Si-young - [Swarovski saleswoman]
- Woo Hyeon - [Camp ground owner]
- Yoo Ok-joo - [Angry customer]
- Lee Eun-joo - [Move Entertainment team leader]
- Go Han-min - [Photographer]
- Park Young-soo - [Columbus Park]
- Lee Jung-yeol - [Bus driver]
- ??? - Min Jae Joon [Plastic surgeon]
- Jung Dae-Ro - [Hee Kyung's acquaintance]
- Yoon Jeong-sub - [Joo Hun's assistant]
- ??? - Oh Nam Joo [Man at Namsan Tower]
- Dayoung - Chen [Move Entertainment celebrity]
- Paul Battle - [Doctor]
- Kim Bong-hee - [Community center grandmother]
- ??? - [Student]
- Kim Won-shik - Ji Woo Hyeon
- Terris Brown - [English teacher]
- Kim Si-woo - [Kindergarten boy]
- Kang Du-hyun - [Playground bully]
- Kim Sang-hyub
- Yaongyi
- Lee Si-eun
- ???
- Kim Young-kyu
- Park Se-jun
Mun Ka-young hace el papel de Lim Ju-kyung.
Cha Eun-woo interpreta a Lee Su-ho en la serie.
??? interpreta a Han Seo-jun en la serie.
Park You-na interpreta a Kang Soo-jin en la serie.
Lim Se-mi interpreta a Lim Hee-kyung en la serie.
??? hace el papel de Lim Jae-pil.
Jang Hye-jin interpreta a Hong Hyun-suk en la serie.
Oh Eui-sik interpreta a Han Joon-woo en la serie.
Kim Min-ki interpreta a Lim Ju-young en la serie.
??? interpreta a Choi Soo-a en la serie.
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