He seems to be just an ordinary teahouse waiter, but with thousands of years of experience, he can enlighten a fallen swordsman, save a dying demon, and see through the true face of ancient treasures. He no longer pursues quick recovery of strength, but lives like a mortal and realizes the seven emotions and six desires that he once ignored.
What immortality brings is not freedom, but endless loneliness, disconnection from the times, and the "secret of immortality" that is coveted by all forces. The protagonist must "return to zero" and rise again and again to uncover the shocking chess game behind immortality.
