This is a fantasy world dominated by beast masters, where people can contract various powerful monsters as their fighting partners. The strength of the beast masters is clearly divided. From the novice apprentice beast master to the world-famous beast master, each level is very different. Various families and sects are fighting openly and secretly to compete for precious beast-controlling resources and territory. Places full of dangers and opportunities such as the Monster Mountains and mysterious ruins have also become the focus of competition between all parties.
