Kim Hye-yoon debuted as an actress with 2013 KBS2 TV Novel 's '' Samsaengi '' , as the teenage era of a supporting character . After landed a memorable role in 2014 OCN 's thriller '' Bad Guys '' , Kim focused her attention on study and only made guest appearance for several works , as she received full scholarship in 2015 to Konkuk University , one of Korea 's leading universities . It was after she finished college ( graduation ceremony in February 2019 ) , that Kim began auditioning for bigger roles , including for JTBC 's satire drama '' Sky Castle '' . The massive success of the series along with her distinctive role as an ambitious and unfriendly but ladylike high school girl , launched her to stardom and won her the 55th Baeksang Arts Awards for Best New Actress
55th Baeksang Arts Awards
55th Baeksang Arts Awards
Kim Hye-yoon