What? I Actually Reincarnated As Stepping Stone In Another World?

Zayn, a wealthy second-generation who was in the prime of his life was known as the “Perfect Human” for mastering various fields of expertise until the peak of perfection was stabbed to death by his fiancée. Because of the cancellation of their engagement, his former fiancée turns out to love him obsessively, so, she stabs him in the heart.“Honey~ I won't let you go, even after death!”After he was dead, he was reincarnated into a fantasy world novel that he had read as Arthur, a side villain and stepping stone. Because he doesn't want to be the protagonist's stepping stone, he will change his fates!“I will change my fate and reach the pinnacle of this life. The Protagonist? Look who's the real protagonist!!”[Ding~! Congratulation to the host for activating the system!]