Maou Slow Life wo Mankitsusuru: Yuusha kara “Kouryaku Muri” to Iwareta kedo, Soko wa Dungeon ja Nai. Tomato Hatake da

Cero, a priest of light, shields the Hero from the Sixth Demon Lord’s curse—only to be transformed into a demon himself. As his reward, he is cast out of the Hero’s party and forcibly teleported far away. At his destination, Cero encounters Lucy, the Sixth Demon Lord’s daughter, who recognizes in him the potential to become a Demon Lord. Together with the demons now serving under him, Cero sets out to develop his new territory. Then, one day, the Hero’s party arrives to eliminate him. But when they venture into the tomato field outside Cero’s castle, they discover monsters lurking among the crops—each one enhanced by Cero’s abilities! What was supposed to be a simple field of tomatoes may prove to be the most unconquerable dungeon of all! Source: Hanashi Media