Who Are You: School 2015

Who Are You: School 2015 (also known in Japan as Love Generation) is a 2015 South Korean television series starring Kim So-hyun, Nam Joo-hyuk, and Yook Sung-jae. It aired on KBS2 from April 27 to June 16, 2015, every Monday and Tuesday at 21:55 (KST) for 16 episodes. It is the sixth installment of KBS's School series which premiered in 1999.

The final episode received a 8.2% nationwide ratings. It was well-received and popular overseas, it established a strong following among young viewers worldwide which led to increased recognition for its cast.

Synopsis
Go Eun-byul and Lee Eun-bi (both played by Kim So-hyun) are identical twins, separated after one is adopted at the age of 5. Eun-bi lives at the Love House, an orphanage in Tongyeong, South Gyeongsang Province, where the younger residents look up to her as a mother figure. However, she hides the fact that she is bullied at school by a gang of mean girls led by Kang So-young (Cho Soo-hyang), while teachers turn a blind eye.

On the other hand, Go Eun-byul is studying at Sekang High School, the most prestigious private high school in Seoul's Gangnam District. Eun-byul's best friend is Han Yi-an (Nam Joo-hyuk), the school's star swimmer and is in love with her since childhood.

However, only Eun-byul is aware of the other's existence. Unlike the cheerful Eun-bi, Eun-byul is prickly and secretive.

Main
Go Eun-byul and Lee Eun-bi are identical twins. Lee Eun-bi lives in an orphanage whereas Go Eun-byul, Eun-bi's twin sister lives with a woman who adopted her. Due to bullying, Eun-bi decided to end her life but she was saved by her twin sister. Eun-bi had amnesia after that. When Eun-byul's adoptive mother mistook Eun-bi as Eun-byul, she starts to assume the identity of her twin sister. Eun-byul leaves in the end to pursue her dreams whilst Eun-bi remains in the school. Described by his father as an idiotic and problematic child, Gong Tae-kwang is widely known as a troublemaker in school. His father is the director of Sekang High School and his mother is a famous actress, but his classmates don't know about this. He is portrayed as a happy-go-lucky person who just wanted to cause trouble, but behind his smile, he was actually a struggling child with a painful life. He suffered a lot but everything changed when he met Lee Eun-bi and stood by her side, even when Kang So-young decided to make her life hell. He developed one sided feelings for her and confesses to her later on.
 * Kim So-hyun as Lee Eun-bi (Go Eun-bi) / Go Eun-byul
 * Kang Ji-woo as young Lee Eun-bi (Go Eun-bi) / Go Eun-byul
 * Yook Sung-jae as Gong Tae-kwang
 * Kim Ye-jun as young Gong Tae-kwang

A star swimmer at Sekang High School. He was great childhood friend with Go Eun-byul, and had feelings for her. He is loyal to his friends and although from a poor background, works really hard to help his father at the same time to become a national champion in swimming. He starts to question the identity of Eun-byul (who is actually Eun-bi in disguise), but as time goes by, he falls for Eun-bi unknowingly.
 * Nam Joo-hyuk as Han Yi-an
 * Go Woo-rim as young Han Yi-an

Supporting

 * Class 2–3

He is pricked by his guilty conscience after a massive cover-up involving the death of one of his students. An intelligent and hardworking student who is always at the top of his class. Pressured by his study-centric mother to do well, he feels overwhelmed. Go Eun-byul and Lee Shi-jin's best friend. She is torn between staying loyal to Eun-byul and accepting So-young's friendship advances. After finding out Lee Eun-bi's real identity, she also became best friends with her. She is best friends with Go Eun-byul and Cha Sung-joo. She is jealous of her friends who seem to have a passion and tries to seek out one of her own. After finding out Lee Eun-bi's real identity, she also became best friends with her. A school bully who found pleasure in bullying Eun-bi. Her transfer to Eun-byul's school soon leads to mistrust and problems between the students.
 * Lee Pil-mo as Kim Joon-seok (homeroom teacher)
 * Lee David as Park Min-joon (class president)
 * Kim Hee-jung as Cha Song-joo
 * Lee Cho-hee as Lee Shi-jin
 * Cho Soo-hyang as Kang So-young
 * Park Doo-shik as Kwon Ki-tae
 * Lee Hwa-kyum as Jo Hae-na
 * Jang In-sub as Sung Yoon-jae
 * Kim Bo-ra as Seo Young-eun
 * Kim Min-seok as Min-suk
 * Choi Hyo-eun as Hyo-eun
 * Lee Jin-kwon as Jin-kwon
 * Ji Ha-yoon as Ha-yoon
 * Park Ah-sung as Ah-sung
 * Seo Cho-won as Cho-won
 * Jo Byeong-kyu as Byung-gyu
 * Kwon Eun-soo as Eun-soo
 * Oh Woo-jin as Woo-jin
 * Jung Ye-ji as Ye-ji
 * Lee Seung-ho as Seung-ho
 * Han Sung-yun as Sung-yeon


 * Sekang High School faculty


 * Lee Hee-do as Vice principal
 * Shin Jung-geun as Dean of students
 * Jung Soo-young as Ahn Ju-ri
 * Lee Si-won as Jung Min-young
 * Choi Dae-chul as Swimming coach
 * Kim Jin-yi as Health teacher


 * Parents


 * Jeon Mi-seon as Song Mi-kyung (Eun-byul's adoptive mother and later Eun-bi's)
 * Jeon No-min as Director Gong Jae-ho (Tae-kwang's father)
 * Jung In-gi as Park Joon-hyung (Min-joon's father)
 * Kim Jung-nan as Shin Jung-min (Min-joon's mother)
 * Kim Se-ah as Shin Yi-young (Shi-jin's mother)
 * Oh Yoon-hong as Min-young and In-soo's mother
 * Jo Deok-hyun as Prosecutor Kang (So-young's father)
 * Jung Jae-eun as So-young's mother
 * Lee Dae-yeon as Han Ki-choon (Yi-ahn's father)

Extended

 * Yang Hee-kyung as Park Min-kyung (House of Love's administrator)
 * Oh Hee-joon as Food delivery man
 * Lee Kang-min as Han Yi-an's swimming senior (ep. 2, 4–5, 11, 16)
 * Yoo Se-hyung as Han Yi-an's swimming senior (ep. 2, 4–5, 11, 16)
 * Yoo Yeon-mi as Yeon Mi-joo (ep. 5–7, 12)

Special appearances

 * Lee Hyun-kyung as Nuri High School teacher (ep. 1)
 * Lee Jae-in as Ra-jin (ep. 1, 5, 14)
 * Shin Seung-joon & Lee Ho-geun as announcers (ep.1)
 * Park Young-soo as noraebang owner (ep. 2)
 * Park Hwan-hee as Kim Kyung-jin (Eun-bi's bully; ep. 1)
 * Kim Min-young as Lee Soo-mi (Eun-bi's bully; ep. 1, 4–6)
 * Lee Jung-eun as Seo Young-eun's mother (ep. 2–3)
 * Choi Su-rin as Song Hee-young (Tae-kwang's mother; ep. 4, 12, 14)
 * Jung In-seo as Jung Soo-in
 * Yum Gyung-hwan (ep. 6)
 * Kim Ga-young as school uniform model (ep. 6)
 * Sam Hammington as Sekang High's new English teacher (ep. 15)
 * Bae Soo-bin as Sekang High 2–3 class' homeroom teacher (ep. 16)
 * Kim Min-kyu as a swimmer

Remake
A Thai remake of the series with the title Who Are You was announced by GMMTV during their "New & Next" event last October 15, 2019 featuring Tipnaree Weerawatnodom (Namtan), Perawat Sangpotirat (Krist) and Kay Lertsittichai. Produced by GMMTV and Nar-ra-tor, it premiered on May 2, 2020, on GMM 25 and Line TV.