Moji is reborn and goes back to the day when he chose the spiritual beast before the end of the world. In his previous life, he relied on the brown bear's ability to withstand the cold to survive in the extreme cold, but Duan Kun, who chose the delicate white fox, was killed by jealousy. After rebirth, Duan Kun, who was also reborn, snatched away the brown bear first and forcibly exchanged the white fox for Moji in the name of "support", which was praised by the whole class. Moji was feeling aggrieved by the white fox's forced conclusion of a life-and-death contract and the loss of his partner, but when they looked at each other, he received a code from the brown bear's past life - it turned out that the brown bear was also reborn! At this time, Duan Kun, who was so carried away, did not know that the brown bear had used the ancient formation to reverse the contract, making him, the "master", completely become the slave of the brown bear.