I Am The Only Demon In The Hero Academy

Zayne Locke travelled into the novel "Heroes and Demons" he had been reading but had dropped due to his upcoming exams, he was not the main character, neither was he a side character but a minor extra villain who dies at the hands of the main heroine. "I'm an extra, so what...I won't be some sitting duck waiting to die.. Sorry dear Mc, I'll have to steal all your opportunities to survive"