Yi Jin Keeps the Promise

My name is Duoyu, a person who is superfluous in the world and a person who is destined to pick up memories. This city has no cultivators, no systems, and no golden fingers. There are only memory-eating monsters that feed on memories, and people who believe in "forgetting is salvation" and want to erase everyone's existence. What I protect is never the good memories, but the evidence of your existence in the world. "Grandma, I am so fishy." "Duo Yu? I don't know him. Who is he?" I remember everything, but they have forgotten me. The whole world is forgetting, and I am the only one left, guarding the past that no one recognizes anymore.