After a student watches a forbidden video circulating online, her sensible older sister must fight to save her from a deadly curse. Joo Won, Park Bo-young, Nam Kyeong-eup, Kang Byul, Kang Hae-in, Choi Ji-heon, Choi Ji Heon, Lee Yoo Joo, Byeol Kang, Namhee Kwon Added on Netflix 2019-06-24.