Lord: From the Start, I Became a Worthless Prince in a Western Fantasy World

【Western Fantasy + Lord + Farming + No System + Racial Conflict + Slow-Burn Development】 I transmigrated into the body of a prince, but before I could enjoy a life of luxury, feasting on delicacies every day, my own father kicked me off to a godforsaken frontier. My older brother is a general, my older sister is a great mage, and even my little sister knows how to do business and make money. And me? The family’s agreed-upon failure? Fine, I’m a failure. As long as nobody bothers me, I can lie flat in this wretched castle until the end of time. But... Looking at the drafty castle that’s about as sturdy as a thatched hut, black bread hard enough to use as a brick, and the magical beasts outside just waiting to charge in and make a meal of us... I snapped! “It’s just farming and infrastructure development. You think all those nine years of compulsory education were for nothing?!” And so, a prince who loves to complain is forced down the path of using modern knowledge to crush another world with superior know-how. “Lord, what do you need all that manure for?” “Don’t ask. It’s alchemy!” “Lord, what kind of magic circle is that?” “Quiet! It’s three-dimensional geometry!” Many years later, gazing upon the thriving city he built with his own hands, Prince Alex could only say, “I really... just wanted to lie flat!”