The Self-Cultivation of a Villain from a Different World

After eating noodles without adding coriander, Leon's eyes darkened and he traveled through time. Became the first heir to the Kingdom of Rhine. I thought I would become a dandy prince from another world, raising elves and teasing demi-human girls. But after gradually understanding the situation, Leon only felt his eyes darken. Within the territory, they organized Japanese raids and assassinated princes and nobles everywhere. Control bravery, restore bravery... Establish an alliance of frustrated braves and launch revenge on the kingdom. Outside the mirror, the country's army was defeated, and the King of the Undead was wreaking havoc. The self-proclaimed Demon King Slime, the Law of the Jungle Spider... There are no locals, all are familiar characters, and they are all his opposites. Leon's mentality exploded. Fortunately, there is no such thing as a perfect place. Everything turned around when he established contact with a woman named Xideer. [Whether to establish a bond: the powerful person of shadow!