Tyrant Girlfriend and Black-hearted Boyfriend? The battle for love, for the survival of the world, is about to begin! She says she doesn’t want him to die because she loves him! Your ‘love’ is just too heavy! Rumi, who works at a university, is always looking for “him” in the crowd. “He” is a character from the legendary game “Ragnarok Fantasy: Dragons’ Battle” and Rumi’s fated lover may have been reincarnated in the modern world. He is the “Demon King” Yuto, the last boss of the game.