The Assassin Gamer

Noctis Hashima is a former high-earning marketer who gets sucked into a game dimension after his brother's death. His father called on him to be his brother's replacement and avenge his brother's death. He also get's romantically involved with female players in the game.
Will he be able to use his skills as a pro gamer to beat the game, or will he repeat the same mistakes his brother did?