Yixing doesn’t plan on saving the world.  He has no desire in becoming the hero of the story.  He just wants to get by life peacefully (as in preferably with as little trouble as possible).  But Yixing isn’t normal to begin with, so that almost immediately crosses out the peaceful part of his life.  He finds himself bounded to a certain fate that he must follow (or else have his kicked by a certain somebody by the name of Wufan).