Set at a prestigious private high school in Gangnam, Seoul, South Korea. Eun-Byeol is a popular student at the private high school. She goes missing and returns, but she has lost her memory. She tries to find out the truth.
|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|
|Lee Da-wit||Park Min-joon|
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