Reincarnated as a Side Character: The Villainess is Obsessed With Me

After a sudden death, Oliver is reincarnated into the world of a novel he once read — a dystopian realm where humans awaken magic and battle monstrous puppets.But he’s not the hero; he’s the hidden, strongest side character of House Rothyl, destined to deliver the final blow to the Villainess… the secret final boss.Only there’s one problem: she’s obsessed with him. Obsessed enough to risk everything, even the world itself.Why is she so fixated on him, and can he survive a life that’s far more dangerous than any death he has faced?___|No Harem| Progression Fantasy | Yandere Female lead | Anti Hero Main Character | Overpowered Characters | Multiple Leads | Realistic Antagonists | Exciting Battles and Challenges | Rich Plot | Clever Main character that gets strong quickly