Segyeui Ju-in

Seo Su-bin stars as Lee Ju-in, a 17-year-old high school student struggling to find her place in love and life, unleashing chaos with a moment of anger that sets off a chain reaction of anonymous notes questioning her actions, altering her quiet life. As the story unfolds, it becomes clear that Ju-in's seemingly carefree existence is rooted in unresolved childhood trauma, strained relationships, and a family crisis that ultimately brings them closer together.