Trash Contract Beast? My White Fox Has Demon Blood

At the contract ceremony, Finn Carter is mocked for summoning only an F-rank white fox, leaving him on the brink of slavery. Just then, he awakens the Divine Evolution System, which reveals the fox's hidden demon bloodline and triggers a celestial phenomenon. Granted a probationary chance, Finn is sent to a mining camp—where completing the system’s task allows the fox to evolve and returns power to him.