Illegitimate Son of the Imperial City

[This is the story of a royal illegitimate son inheriting the family business step by step] [No system*no cheats] Who am I? My name is Suche... An illegitimate child with no identity, a mud-legged kid in a back alley, no one would care even if he died. But I found... Why is Her Royal Highness as well-behaved as her sister? The general is surrounding me like a follower? Why does a little sister who is five years older than me call me senior brother? The little fox I picked up by chance turned out to be a human? … When I was sixteen years old, I took the initiative to go to death row and waited for eight days to be executed.