Though she comes from a rich family, Gabin is a bullied loner at school. That doesn't mean she puts up with bullying from other students, though—Gabin is infamous for her fierce personality. Worried about Gabin's well-being, her family secretly offers Tae-ung $500,000 to transfer schools and act as her bodyguard. Will Tae-ung be able to protect her from the school bullies, all while keeping his identity hidden from Gabin and the other students?