High school girls Lee Eun-bi and Ko Eun-byeol live miles apart and their experiences are vastly different, yet they share an uncanny resemblance.
Kim So-hyun
Lee Eun-bi / Go Eun-byul
Nam Joo-hyuk
Han Yi-ahn
Yook Sung-jae
Gong Tae-kwang
Lee Cho-hee
Lee Shi-jin
Jeon No-min
Gong Jae-ho
David Lee
Park Min-joon
Kim Hee-jung
Cha Song-joo
Lee Pil-mo
Kim Joon-seok
Shin Jung-keun
Dean of Students
Yang Hee-kyung
Park Min-kyung
Jeon Mi-seon
Song Mi-kyung
Jeong In-gi
Park Joon-hyung
Kim Min-seok
Min-suk
Kim Jung-nan
Shin Jung-min
Lee Hwa-Kyum
Jo Hae-na
Kim Bo-ra
Seo Young-eun
Lee Si-won
Jung Min-Young
Kang Ji-woo
Young Go Eun-byul
Cho Soo-hyang
Kang So-young
Park Hwan-Hee
Kyung-Jin
Kim Ye-joon
Young Gong Tae-kwang
Choi Hyo-eun
Hyo-eun
Han Sung-yeon
Sung-yeon
