Realist Maou Niyoru Seiiki Naki Isekai Kaikaku
In a dilapidated castle, Astaroth awoke as a Demon King. With his 'wisdom from his past life,' he would rule over his lands as a thorough 'realist.' "Demon King, why are you attacking the level 1 Heroes?" "Defeat them before they become stronger. That is called strategy." "Demon King, why are you sending fake money to the enemy country?" "To bring chaos to their economy, so they will self-destruct." "The werewolf troops have attacked. Should we use silver bullets?" "Not bullets, shoot them with cannons."
And like that, Astaroth 'reformed' the old tendencies. He became a lord who was loved by the people and his subordinates, and he would go on to be called the most powerful Demon King in history.
Король демонов — реалист. Легенда о перестройке мира, The Legendary Rebuilding of a World by a Realist Demon King, リアリスト魔王による聖域なき異世界改革, 现实主义魔王的异世界改革, 現實主義魔王的異世界改革, Η θρυλική ανακατασκευή ενός κόσμου από έναν ρεαλιστή βασιλιά δαίμονα, 리얼리스트 마왕에 의한 성역없는 이세계 개혁