What? You get a partner assigned to you when you work in the universe?! Bai He is a life-form created by the universe, tasked with managing space and time. With the arrival of Bai Xingxing, he gradually realizes that he has long been caught up in a vast game of strategy, and even the universe he trusts most may be one of the players. The two investigate together and descend into hell, where they join forces with its various rulers and Michael, captain of the angel corps, to capture several runaway fallen angels. The final battle causes the space-time system to collapse. Bai Xingxing, the successor to the position of space-time manager chosen by the universe long ago, sacrifices all her power to restore the proper order of space and time, dissolving into tiny stars scattered across the universe.
(Bai He and Bai Xingxing share the same values, support each other, and become close friends. Bai He cannot keep sacrificing himself for the world forever, and will eventually retire with white hair. Before then, he must find someone to take his place. But that person is the blue-haired young man right before his eyes. Bai He is heartbroken, but the young man is unafraid and willing to take on this responsibility: "I'll grow my hair long, just like you. I won't let you down.")
