Born into luxury and arrogance, Cecilia Sylvie discovers her grim fate as a villainess from a past life at a tender age. Determined to rewrite her story and escape death, she disguises herself as a boy named 'Cecil' and enrolls in an academy. Despite her simple wish for a quiet school life, 'Cecil' garners unwanted attention from classmates, the persistent crown prince, and a strangely behaving main heroine. Juggling these unforeseen circumstances, Cecilia strives to maintain her male facade and evade a tragic conclusion.