<Li> Lee Kang - min & Yoo Se - hyung as Han Yi - an's swimming seniors (episode 2, 4 - 5, 11, 16) </Li> <Li> Yoo Yeon - mi as Yeon Mi - joo (episode 5 - 7, 12) </Li> <Ul> <Li> Lee Hyun - kyung as Nuri High School teacher (episode 1) </Li> <Li> Lee Jae - in as Ra - jin (episodes 1, 5, 14) </Li> <Li> Park Hwan - hee as Kim Kyung - jin (episode 1) </Li> <Li> Shin Seung - joon & Lee Ho - geun as announcers (episode 1) </Li> <Li> Park Young - soo as noraebang owner (episode 2) </Li> <Li> Kim Min - young as Lee Soo - mi (Eun - bi's bully; episodes 1, 4 - 6) </Li> <Li> Lee Jung - eun as Seo Young - eun's mother (episodes 2 - 3) </Li> <Li> Choi Su - rin as Song Hee - young (Tae - kwang's mother; episode 4, 12, 14) </Li> <Li> Yum Gyung - hwan (episode 6) </Li> <Li> Kim Ga - young (Stellar) as school uniform model (episode 6) </Li> <Li> Sam Hammington as Sekang High's new English teacher (episode 15) </Li> <Li> Bae Soo - bin as Sekang High 2 - 3 class' homeroom teacher (episode 16) </Li> <Li> Kim Min - kyu as a swimmer . </Li> </Ul> <Li> Lee Hyun - kyung as Nuri High School teacher (episode 1) </Li>

Sinopsis drama korea who are you school 2015