Question: What is the name of the South Korean model and actor, who starred in Who Are You: School 2015?
Sentence (from "Who Are You: School 2015"): Who Are You: School 2015 (Hangul: 후아유: 학교 2015 ; RR: "Huayu: Hakgyo 2015 " ) is a South Korean television series, starring Kim So-hyun, Nam Joo-hyuk, and Yook Sung-jae.
Relevant evidence: Yes