Dai Maou-sama no Machizukuri ~Mahou to Kagaku to Mamono ga Tsukuru Risou Machi~ (Associated Names)

Instead of building a dungeon to feed on the despair of humans, the eccentric Procell used his [Creation] powers to build a city where humans and monsters could live and laugh together. Before long, he became one of the three strongest Demon Lords. However, through a series of events, a jealous fellow Demon Lord sent…