One day, Axel Savoncho, a man who was a fan of Harems and Visual Novels Finds himself brought into one of the games he's played before. Using this knowledge to his advantage, he sets out with one goal in mind. To use what he knew about the game to turn the heroines of the game into his personal harem. However, when he realizes the true cruelty of this world, it'll set him off on a journey filled with love, the harsh reality, and a dark secret about the world that'll change the course of this world's history forever. This is the story of a man who would one day be known all across the world as the Harem Ruler.