The Tuner of the Dragon Reverse Game

What I deliver is not meals, but the "possibilities" of the world. My name is Lu Qi, and I was a delivery boy until I started getting orders from "outside the world." From then on, I became the common "mistake" of two unknowable beings. The "Boundary Marker" wants me to forget, and the "Guardian" wants me to sacrifice. On my navigation map, the city is losing its disguise, revealing its spasmodic veins - an ancient grid that is tortured by two "diseases" and is on the verge of suffocation. Now, new orders are tingling the screen again. This time, what I want to deliver is the "only prescription" to let the world breathe again. ——The reverse dragon situation has begun, and I am the only tuner.