So We're Co-Owners of a Magic Shop?!

In a world where the strong reign supreme, two orphan siblings with no magic affinity are doomed to be left behind by the times of change. An overly protective brother must push against those who oppress him in order to steel from those more powerful and feed his sister. One fateful encounter later, both siblings receive a deed to a magic store and an overpowered system. They must work in a store training pets, brewing potions, forging weapons, and more; all in an attempt to rise from the pits of society and rule above all.