Start with the Beastmaster Contract

This is a story about traveling through time while going to the toilet.
Traveling to the era of beast control, contracting beasts, cultivating beasts, and using knowledge (systems) to carve out a path for yourself!
When the mythical beast control envoy, the well-known beast control research doctor, Lin Qianyu was asked what experience he could share.
His answer was: "I can achieve today's success by relying on a little bit of luck and a little bit of hard work!"