Which Wizard Will Kill Me?

Life at Papilon, the elite magic school, is full of hardships for Rhea, who's failing in every possible way. One day, when her hidden friendship with the top student and her childhood friend Sion gets discovered by the mysterious transfer student, Joon, Rhea can't help but notice the energy of death surrounding him... Who will be the wizard to kill her?! (Source: Naver Corporation, translated)