Mechanical Symphony: I Am the Only Door in the World

This is not the movement of evolution, this is the funeral of civilization. At the age of seventeen, Rick found that he had become the "betrayer" of all mankind. In this "trial field" held captive by advanced civilizations, the so-called "chosen ones" are nothing more than mobile biological sockets, physical tickets to their home earth. The chaebol is hunting, monsters are watching, and everyone is waiting for the day when he will be completely drained. Until Rick picked up the rusty music box on the edge of the battlefield where he had fallen 10,000 meters. When the melody of "Für Elise" sounded in the jungle of flesh and machinery, physical constants were forcibly rewritten, gravity was reduced to an adjustable variable, and cause and effect collapsed in the rondo. "They call me tickets, they call me keys, they call me hope." Rick stepped on the golden keys of the void, overlooking the entire collapsed steel city, and the purple gear tattoo on the back of his hand turned crazily: "Since the door has been opened, before everyone comes in, listen to me play this funeral song." [Law-level relic: To Alice. Current synchronization rate: 3.1%...] [The melody rises, and all living beings are silent.