Con-man instructions on how to live as a Noble

[No system + Unique power system + special abilities + party building + War + No Harem + Dark Fantasy.] Nameless con man was beaten to death by a group of mafia for a scam he did. But death was not the ending for him as he found himself in the body Silas Viremont. The heir of Great Viremont family. Silas noticed that he was inside a game. And it was not just an average game. A highly specialized Eroge designed to capture male and female gazes. In the world filled with Danger, sex and beautiful people, Silas didn't want none of those. He only wanted to live a normal rich life. So he worked. He worked hard so that he would never work again in his life.