No matter which possibility it is, Su Yu can't verify it for now.
He can only try to find a way into the upper narrative layer and then look for evidence.
For now, he'd better finish the experiment and then take on the "Book of Narrative."
However, although Su Yu already understands the problem lies in having a "name and identity,"
it's still somewhat difficult to resolve.
After all, Su Yu is not the "protagonist" right now, not even named or identified; he's just a "walk-on part."
Such a state means he fundamentally lacks narrative existence and cannot create a Book of Narrative of his own.
Whether he is the "protagonist" or not is not for him to decide; it is likely determined by some higher existence.
This situation seems to be somewhat of a dead end.
Thankfully, for someone as powerful as Su Yu, knowing the problem means it won't be hard to find a solution.
Su Yu begins to search for characters with "narrative existence" to observe them.
