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Park Seo-kyung (Lim Hee Gyung [Young]), Park Ju-Hwan (Lim Joo Young [Young]), Ok Joo-ri ([Neighborhood woman]), Choi E-sun ([Yongpa High student]), Han Myeong-hwan ([Yongpa High student]), Lee Tae-ri (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]), Kang Du-hyun ([Playground bully])

Cha Yeong-ok ([Neighborhood woman]), Shin Jae-whi (Lee Sung Yong [Yongpa High student]), Lee Seung-Woo (Lee Su Ho [Young]), Shin Seo-woo, Kim Si-woo ([Kindergarten boy])

Hwang Jung-ha (Byeon Joon Hyeok [Yongpa High student]), Shin Jae-whi (Lee Sung Yong [Yongpa High student]), Lee Jae-eun ([Su Ho's housekeeper]), Um Tae-Yoon ([Comic store customer]), Jang Young-hyeon ([Convenience store friend #1]), Moon Hak-jin ([Convenience store friend #2]), Ham Tae-Gyun ([Convenience store friend #3]), Song Hoon ([History teacher]), Terris Brown ([English teacher])

Kang Chan-hee (Jeong Se Yeon [Su Ho & Seo Jun's friend]), Lee Go-eun (Lim Joo Gyung [Young]), Shin Jae-whi (Lee Sung Yong [Yongpa High student]), Lee Seung-Woo (Lee Su Ho [Young]), Kim Hye-yoon (Eun Dan Oh [Movie goer]), Lee Jae-wook (Baek Kyung [Movie goer]), Lee Sun-Young ([Math teacher]), Jo Seok-in (Movie Watcher), Cho Seok-In ([Cinema viewer]), Kim Won-shik (Ji Woo Hyeon)

Kang Chan-hee (Jeong Se Yeon [Su Ho & Seo Jun's friend]), Kim Jae-hwa ([Music teacher]), Joo Se-Bin (Jin Hee Jung [Seobom High freshman student bully])

Shin Jae-whi (Lee Sung Yong [Yongpa High student]), Kim Jae-hwa ([Music teacher]), Seo Sang-won (Doctor Kang [Soo Jin's father]), Choi Da-young ([Reporter])

Shin Jae-whi (Lee Sung Yong [Yongpa High student]), Lee Sun-Young ([Math teacher]), Yoo Dam-Yeon ([Soo Jin's mother]), Jung Gun-joo (Ryu Hyung Jin [Baseball player]), Geum Gwang-san ([Sung Yong's father]), Park Ji-ho ([Baseball game spectator]), Jo Yoon-soo ([Student])

Lee Si-young ([Swarovski saleswoman]), Woo Hyeon ([Camp ground owner]), Yoo Ok-joo ([Angry customer]), Lee Eun-joo ([Move Entertainment team leader])

Song Hoon ([History teacher]), Seo Sang-won (Doctor Kang [Soo Jin's father]), Yoo Dam-Yeon ([Soo Jin's mother]), Kang Cho-won ([Saebom High student bully]), Ko Han-min ([Photographer])

Lee Go-eun (Lim Joo Gyung [Young]), Lee Seung-Woo (Lee Su Ho [Young]), Lee Eun-joo ([Move Entertainment team leader]), Kang Cho-won ([Saebom High student bully]), Jang Ye-Rim ([Female student]), Ko Han-min ([Photographer])

Kang Chan-hee (Jeong Se Yeon [Su Ho & Seo Jun's friend]), Park Young-soo ([Columbus Park]), Seong Jeong-seon ([Community center grandmother]), Jeong Sae-rom ([Soo Jin's math tutor]), Kim Bong-hee ([Community center grandmother])

Hwang Jung-ha (Byeon Joon Hyeok [Yongpa High student]), Kang Chan-hee (Jeong Se Yeon [Su Ho & Seo Jun's friend]), Seo Sang-won (Doctor Kang [Soo Jin's father]), Yoo Dam-Yeon ([Soo Jin's mother]), Yoon To-Wang ([Gangster])

Lee Sun-Young ([Math teacher]), Joo Se-Bin (Jin Hee Jung [Seobom High freshman student), Kang Cho-won ([Saebom High student bully]), Lee Jung-yeol ([Bus driver]), Hong Dae-sung ([Move Entertainment employee]), Lee Han-wi (Min Jae Joon [Plastic surgeon]), Jung Dae-ro ([Hee Kyung's acquaintance]), Yoon Jeong-seop ([Joo Hun's assistant])

Hwang Jung-ha (Byeon Joon Hyeok [Yongpa High student]), Seo Sang-won (Doctor Kang [Soo Jin's father]), Yoo Dam-Yeon ([Soo Jin's mother]), Kang Cho-won ([Saebom High student bully]), Park Young-soo ([Columbus Park]), Jung Dae-ro ([Hee Kyung's acquaintance]), Yoon Jeong-seop ([Joo Hun's assistant])

Lee Go-eun (Lim Joo Gyung [Young]), Lee Seung-Woo (Lee Su Ho [Young]), Kim Ji-su ([Wedding shop staff]), Kim Young-dae (Oh Nam Joo [Man at Namsan Tower]), Kwon Ban-seok (Dr. Han Chae Hoon [Emergency room doctor]), Dayoung (Chen [Move Entertainment celebrity]), Lee Byung-Jae ([Seo Jun's band member]), Paul Battle ([Doctor])

Dayoung (Chen [Move Entertainment celebrity]), Lee Byung-Jae ([Seo Jun's band member])