A young man named Igusa, who has a deep love for "evil," finds himself reincarnated as his dream role—the "Demon Lord." However, he faces a serious dilemma: his new world is an alien planet ravaged by interstellar war, where both swordsmanship and magic have all but vanished! Just as he despairs over becoming a Demon Lord with no lands left to conquer, he encounters a self-proclaimed "Hero" girl and a beast-eared maiden from another world. Igusa forcefully recruits them, grinning wickedly like a true villain. If there’s no land left to conquer, then he’ll just have to set his sights on ruling the cosmos! Join Igusa and his bonded companions as they dive headfirst into an intergalactic dark fantasy, where they relentlessly pursue "evil" across the stars!