Comments of chapter undefined of Reincarnated as the stepson of a mafia mob [BL]

Hello. To those who were confused about the MC (supernatural) occupation. In Korea, it was compulsory to attend military service for two years. (I added this to the plot.) Mc is brilliant, so he got a high position in his troop. (when the government created a group for elites, he was one of the high-ranking officials.)His hobbies were formed when he was still a kid (since his family likes sports so much and he gets dragged by his cousins and other relatives.) He likes to stay home when he gets hooked on reading mangas & watching animes, which eventually leads to games. It was a whim that the MC created his own game (that led him to success.)

Why does he not train?