Ura Kagyou Tensei: Moto Gokudou ga Kazoku no tame ni Ryouchi Hatten Sasemasu ga Nani ka? @COMIC

Synopsis

A gangster who has lived all alone in the world is reincarnated into another world as Ryu, the third son of a knight family. He grows up receiving the love of his family, which he had never had the chance to have, and then he realizes. His kind-hearted ancestors have been very good at fighting but weak at work, and they are an Extremely poor family! He has no choice but to step in and use his unknown skill "Gokudo" and his knowledge of the underworld from his previous life to sell the coffee, chocolate, and handcarts he makes. He improves his fields to further increase the yield of raw materials, and his stall at the festival is a huge success, and he gets one new business after another on track. However, as he steadily increases his territory, the family is hated by a thug nobleman and is in danger.. .?