Tired of the endless cycle of losing to "Prophesized Heroes" with tragic backstories, the current Demon Lord decides the best way to win is through aggressive pacifism.

After a prophecy claims a new Hero is born in the human town of Garia, he realizes that trauma and despair are what actually forge a Hero's power. His genius plan? Disguise himself as a human boy named Ren, infiltrate the village, and ensure the Hero has the most boring, happy, and well-fed childhood possible so they never have a reason to pick up a sword