Taida na Akujoku Kizoku ni Tensei Shita Ore, Scenario wo Bukkowa Shitara Kikaku-gai no Maryoku de Saikyou ni Natta

He's been reincarnated as Weiss, the villainous nobleman of a favorite video game. What awaits him is a hopeless ruinous end. He wants to avoid that at all costs! So he must acquire overwhelming power for which even the protagonist of this is no match.

(Source: Kadokawa, translated)