Timeline: In a parallel-universe version of the world of Journey to the West, the Heavenly Court packages the pilgrimage as a "Buddhist-Taoist joint reality show," which the immortals of the Three Realms can watch and tip through the Mysterious Light Mirror.
Core premise: The protagonist is bound to a Merit Quest System. By completing absurd missions, he earns merit points that he can exchange for rewards. But the System is actually a "pilgrimage performance assessment program" jointly developed by Buddha and the Jade Emperor.