 Naive Hyo-sun, meanwhile, stubbornly seeks affection at every turn, only to slowly realize she's losing Ki-hoon and everything else in her life to her cold stepsister.Eight years later, Jung-woo (Ok Taecyeon) reappears in Eun-jo's life, a boy she used to treat as her little brother who is now a young man determined to win her heart.Reluctant sisters Eun-jo and Hyo-sun both experience angst and rivalry, as their polar-opposite personalities and love-hate relationship bring them through many ups and downs from adolescence to adulthood.