Okiraku Ryoushu no Tanoshii Ryouchi Bouei ~Seisan-kei Majutsu de Na mo na Kimura wo Saikyou no Jousai Toshi ni~

Synopsis:

After all his hard work, Van, a man reincarnated as an aristocratic boy, is regarded as a child genius. However, he is instantly elevated to the position of ruler of a frontier settlement after being identified as the possessor of "production magic." The sorcery that was deemed useless, however, is really extraordinary since, with the necessary elements, it can create anything! A tiny, impoverished village becomes a massive metropolis thanks to his wizardry and his knowledge of his former existence.