"Who Are You: School 2015" is a South Korean television series that aired in 2015. The show follows the story of two high school girls, Lee Eun Bi and Go Eun Byul, who are identical twins separated at birth. After a series of events, Eun Bi assumes her sister's identity at a new school, leading to various challenges and discoveries about her past. The drama explores themes of identity, friendship, and the struggles of adolescence. It features a cast that includes Kim So Hyun, Yook Sung Jae, and Nam Joo Hyuk, and it received positive reviews for its engaging storyline and character development.