The Tales of Nights - Season 2 Episode 4 A Witch's Journey
Overview: Dong-ha, a young photographer, is unable to get over his ex-girlfriend Young-in, who disappeared a year ago. In fact, she has become an apprentice witch who visits Dong-ha nightly to have sex. Ki-hae, a beautiful young model, has fallen for Dong-ha, and Young-in must resolve whether she can give up her ex and follow her dream.