A young man ascended to immortality at the age of fifteen, and after only eight hundred years of cultivation, he became an immortal. He was called a legend by the world.
The two realms of demons and immortals are fighting each other, and the boy and the demon king are fighting in a stalemate.
In the end, the battle ended with the boy's defeat.
From then on, his immortal body was sealed, transformed into a mortal body, and went through reincarnation.
And the demon king was counterattacked by the secret method and fell into reincarnation.
The main story is about the two meeting, knowing, falling in love, and finally turning against each other in reincarnation.
(The article may be sweet in the early and middle stages, but it will definitely be cruel in the end, so proceed with caution.)