Merea was summoned to a place called "Sacred Mountain of Lindholm" where spirits gather upon their death. He was called upon using an Otherworldly Grass which found its way to his world. The reason for summoning him was to dispel the lingering attachment and/or regrets of a group of heroic spirits from another world. Brought up as a hero to dispel regrets, the era of the world made him into a demon lord instead.
He was reincarnated as Luke Wizalia Gilbert, a hated villainous noble who, due to his overwhelming talent, would eventually be defeated by the protagonist in a "serves you right" moment. The only way to avoid this disastrous end is... "hard work"!! By defying fate, Luke gradually captivates the beautiful and talented daughters of prestigious families, and even attracts shadowy figures with hidden powers who were never meant to be involved, as well as the heroine who was supposed to side with the protagonist...