Kuu was supposed to be dead. He was crushed under the giant rotten tree where Boro Takebol lives. Eventually, a sprout sprouted from Kuu’s corpse.

Kuu realized that he was still able to think and act, and that he had become one with the tree that had killed him.
Kuu became the leader of the “∞” cult, using himself as a symbol of transmigration. He is still the only follower.