My Game Changes the World

I once witnessed the secrets of the king in the Spring and Autumn Period, and I also served as a little chief in Ireland as a fox demon. I have shown my bravery with thousands of colleagues in the arena of another world, and I have also competed with legendary figures under the sky of history. I have crossed the ocean to communicate with girls of the same age on the other side of the world, and I have also crossed time to discuss the future with children from the mythical era... Until I discovered that my game affected reality.