Composer
Director
Original Creator
Screenwriter
Main Role
- Mun Ka Young Main Role
- Cha Eun Woo Main Role
- Hwang In Youp Main Role
- Park You Na Main Role
Support Role
- Jang Hye Jin Support Role
- Park Ho San Support Role
- Im Se Mi Support Role
- Kim Min Ki Support Role
- Oh Eui Shik Support Role
- Kang Min Ah Support Role
- Lee Il Joon Support Role
- Lee Woo Je Support Role
- Lee Joo Ahn Support Role
- Lee Sang Jin Support Role
- Han Yi Young Support Role
- Yeo Joo Ha Support Role
- Jung Joon Ho Support Role
- Jeon Hye Won Support Role
- Seo Hye Won Support Role
- Kim Ryul Ha Support Role
- Oh Yu Jin Support Role
- Lim Hyun Sung Support Role
- Ahn So Rim Support Role
- Ahn Sang Woo Support Role
- Kim Byung Chun Support Role
- Go Woo Ri Support Role
- Kim So Bin[Classmate]Support Role
Guest Role
- Park Sung JinYoo Kang HyunGuest Role
- Kim Jeong HakMr. Oh [Move Entertainment employee]Guest Role
- Oh Chae Eun[Woo Hyun's girlfriend]Guest Role
- Han Sang Jo[Physical education teacher]Guest Role
- Yoon Seo AhLim Hee Kyung [Teen]Guest Role
- Noreen Joyce GuerraHan Tae Hee [Student]Guest Role
- Kim Da HyeLee Yeon SooGuest Role
- Lee Ye Seo[Joo Kyung's friend]Guest Role
- Han Ji Ho[Photographer]Guest Role
- Kwon Hye Ryung[Bully]Guest Role
- Dok Ko Kwang[Student]Guest Role
- Li Yi Man[Student]Guest Role
- Jung Ye Nok[Bully leader]Guest Role
- Lee Ji Wan Guest Role
- Kim Yo Han Guest Role
- Pyo Dong Jun Guest Role
- Park Seo KyungLim Hee Kyung [Young] (Ep. 1)Guest Role
- Park Ju HwanLim Joo Young [Young] (Ep. 1)Guest Role
- Ok Joo Ri[Neighborhood woman] (Ep. 1)Guest Role
- Choi Yi Sun[Yongpa High student] (Ep. 1)Guest Role
- Han Myung Hwan[Yongpa High student] (Ep. 1)Guest Role
- Lee Tae RiWang Hyun Bin [Joo Gyung's crush] (Ep. 1)Guest Role
- Kang Du Hyun[Playground bully] (Ep. 1)Guest Role
- Yoon Seo Yeon[Playground bully] (Ep. 1)Guest Role
- Cha Yeong Ok[Neighborhood woman] (Ep. 1-2)Guest Role
- Hwang Jung HaByeon Joon Hyeok [Yongpa High student] (Ep. 1, 3, 12, 14)Guest Role
- Lee Go EunLim Joo Kyung [Child] (Ep. 1, 4, 10, 15)Guest Role
- ChaniJeong Se Yeon [Su Ho & Seo Jun's friend] (Ep. 1, 4-5, 11-12,16)Guest Role
- Kim Shi Woo[Kindergarten boy] (Ep. 2)Guest Role
- Park Jin Young[Barista] (Ep. 2)Guest Role
- Shin Seo Woo(Ep. 2)Guest Role
- Shin Jae HwiLee Sung Yong [Yongpa High student] (Ep. 2-4, 6-7)Guest Role
- Lee Seung WooLee Su Ho [Child] (Ep. 2, 4, 10, 15)Guest Role
- Uhm Tae Yoon[Comic store customer] (Ep. 3)Guest Role
- Lee Jae Eun[Su Ho's housekeeper] (Ep. 3)Guest Role
- Jang Young Hyun[Convenience store friend #1] (Ep. 3)Guest Role
- Moon Hak Jin[Convenience store friend #2] (Ep. 3)Guest Role
- Ham Tae Gyun[Convenience store friend #3] (Ep. 3)Guest Role
- Park Hyun JungLee Mi Hyang [Seo Jun’s mother] (Ep. 3-4, 6, 8, 11)Guest Role
- Terris Brown[English teacher] (Ep. 3)Guest Role
- Song Hoon[History teacher] (Ep. 3, 9)Guest Role
- Kim Hye YoonEun Dan Oh [Movie goer] (Ep. 4)Guest Role
- Lee Jae WookBaek Kyung [Movie goer] (Ep. 4)Guest Role
- Kim Won ShikJi Woo Hyun (Ep. 4)Guest Role
- Cho Seok In[Cinema viewer] (Ep. 4)Guest Role
- Lee Sun Young[Math teacher] (Ep. 4, 7, 13)Guest Role
- Kim In YiLee Yeon Soo [Hee Jung's friend] (Ep. 5)Guest Role
- Kim Jae Hwa[Music teacher] (Ep. 5-6)Guest Role
- Joo Se BinJin Hee Jung [Seobom High freshman student bully] (Ep. 5, 13)Guest Role
- Choi Da Young[Reporter] (Ep. 6)Guest Role
- Seo Sang WonDoctor Kang [Soo Jin's father] (Ep. 6, 9, 12, 14)Guest Role
- Jung Gun JooRyu Hyung Jin [Baseball player] (Ep. 7)Guest Role
- Geum Kwang San[Sung Yong's father] (Ep. 7)Guest Role
- Park Ji Ho[Baseball game spectator] (Ep. 7)Guest Role
- Jo Yoon Soo[Student] (Ep. 7)Guest Role
- Kim Nam Ho[Deliveryman] (Ep. 7)Guest Role
- Yoo Dam Yeon[Soo Jin's mother] (Ep. 7, 9, 12, 14)Guest Role
- Lee Si Young[Swarovski saleswoman] (Ep. 8)Guest Role
- Woo Hyun[Camp ground owner] (Ep. 8)Guest Role
- Yoo Ok Joo[Angry customer] (Ep. 8)Guest Role
- Lee Eun Joo[Move Entertainment team leader] (Ep. 8 & 10)Guest Role
- Go Han Min[Photographer] (Ep. 9-10)Guest Role
- Kang Cho Won[Saebom High student bully] (Ep. 9-10, 13-14)Guest Role
- Jang Ye Rim[Student] (Ep. 10)Guest Role
- Sung Jeong Seon[Community center grandmother] (Ep. 11)Guest Role
- Jung Sae Rom[Soo Jin's math tutor] (Ep. 11)Guest Role
- Kim Bong Hee[Community center grandmother] (Ep. 11)Guest Role
- Yoon Hyo Sik[Doctor] (Ep. 11)Guest Role
- Park Young Soo[Columbus Park] (Ep. 11, 14)Guest Role
- Yoon To Wang[Gangster] (Ep. 12)Guest Role
- Lee Joong Yul[Bus driver] (Ep. 13)Guest Role
- Hong Dae Sung[Move Entertainment employee] (Ep. 13)Guest Role
- Kim Jin Ok[Cashier] (Ep. 1)Guest Role
- Lee Han WiMin Jae Joon [Plastic surgeon] (Ep. 13)Guest Role
- Jung Dae Ro[Hee Kyung's acquaintance] (Ep. 13-14)Guest Role
- Yoon Jung Sub[Joo Hun's assistant] (Ep. 13-14)Guest Role
- Kim Ji Su[Wedding shop staff] (Ep. 15)Guest Role
- Kim Young DaeOh Nam Joo [Man at Namsan Tower] (Ep. 15)Guest Role
- Kwon Ban SukDr. Han Chae Hoon [Emergency room doctor] (Ep. 15)Guest Role
- Paul Battle[Doctor] (Ep. 15)Guest Role
- Im Da YoungChen [Move Entertainment celebrity] (Ep. 15-16)Guest Role
- Lee Byung Jae[Seo Jun's band member] (Ep. 15-16)Guest Role
- Wang Woo Jin[Delinquent student]Guest Role
Unknown
- Min Chae Min Unknown
- Kim Cha Yoon Unknown
- Lee Chae Hyun Unknown
- Baek So Hyun Unknown
- Han Seung Bin Unknown
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