The Fashionable Jessica, imagined the first day at her new school she transferred to after her mother's remarriage abit differently; she didn't know it'd be an ultra-strict and conservative girl's school. So instead of a sweet high-school romance, she butts heads with the stern Student Counsil President Taeyeon - who turns out to be her new step sister. And she has to learn that hate and attraction are often not that apart.