Reincarnated Yakuza RY

"A yakuza man who has lived his life as an orphan in extreme solitude is reincarnated into another world as the third son of a knightly family, Ryu. He receives the love of a family he never had before and grows up healthily, but eventually realizes that they are a super-poor family with a strong fighting spirit but a weak business sense, passed down from generation to generation. He realizes that he has to do something, so he uses his unknown skill "Gokudo" and knowledge of his past secret business to sell coffee, chocolate, and carts, improve the harvest of raw materials by improving the fields, and put up a booth at the festival, achieving great success and putting one new business after another on track. However, as he steadily increases his territory, danger looms over the family that is hated by the aristocratic gangsters who are jealous of them...