Souzou Renkinjutsushi wa Jiyuu wo Ouka suru: Kokyou wo Tsuihou saretara, Maou no Ohizamoto de Chouzetsu Kouka no Magic Item Tsukuri-houdai ni Narimashita

The story centers around a bureaucrat named Thor, whose alchemy skills go unappreciated in his line of work. When he is expelled to the demon lord's domain, his life takes a huge turn. With his ability to create powerful magic items, he turns the kingdom around, alongside the company of a beautiful maid. (Source: ANN)