In "Under the Shadows of Night," Seolhyun Jeong, also known as Hyu, is an 18 yearold high school student at Jeongwon High School. She is admired for her striking beauty and exceptional intelligence. Beyond her academic achievements, Seolhyun is also a popular figure on social media and works as a model for Innisfree, a renowned Korean cosmetics brand. However, behind her seemingly perfect life, Seolhyun hides a dark secret: she is being stalked and harassed by her first love from middle school, who has become a psychopath obsessed with her. Unable to let go, he follows her constantly, threatening her peace of mind and sense of safety. This ongoing harassment traps Seolhyun in a state of fear, as she struggles to maintain her flawless image while dealing with the lurking danger. Fortunately, her childhood best friend Minwoo, who stands at 1.80 meters, is always by her side. He provides comfort and protection, offering her a sense of security amidst the chaos. The story follows Seolhyun as she tries to balance her studies, her growing career, and her friendships, all while being haunted by a past she cannot escape.