the villain MC uses her cheat power (knowledge) to prevent all of the target characters from experiencing their tragic futures. All of them end up falling for the MC for what she did, but she would always be none the wiser. Then the real heroine comes with the same reincarnated memories and chose to build a reverse harem route that was not implemented in the game, but failed spectacularly because the world has changed from what she knew. In the meantime, the villain MC uses the brilliant 21st century general knowledge (and cooking) to improve the life standards of her fief, becoming a conglomerate for all different kinds of revolutionary products, bringing ire from all merchants, but because her patrons include all of the nobles including the royalty, no one can do anything about her. Then, the demon king appears to destroy everyone, but because the MC already knows him coming, she and her reverse harem managed to win against the demon king easily (with or without the actual heroine's help). THE END.