Ru Rui and My Journey to Another World

Travelers from every world, let's journey together to all kinds of worlds and set off on an exciting adventure. Here, you'll find a primitive world where people live alongside dinosaurs, a high-martial world where people struggle to survive against ferocious beasts, and a magical world where spirits are summoned to fend off disasters... In these worlds, mathematics is like a bond that links the powers of every realm. Witchcraft, martial arts, and magic all require mathematics to cultivate. Mighty travelers, keep up, and don't fall into a rift in space and time along the way!