The Walker from the Type Moon, the Demon King Rimuru

Childhood sweethearts, Kuonji, two innocent magicians, the coal witch's fiancée, and Rimuru, the overpowered template. This might be a slow-burn story, but it definitely won't be delayed. As the only son of an international speculator and a financial tycoon, Xiaorui has always had a dream. That is, after he survives this damned elite education stage and reaches the passing grade expected by his parents, he will honestly go back to being a spoiled rich kid, living a life of leisure and enjoying all the luxuries of the world. However, he survived heaven and earth, but not the era of time travel. After waiting bitterly for 25 years, he was inexplicably transported to another world. He's in Type-Moon, just got off the plane, and he's asking the experts on Zhihu: how do I travel back in time?