Good take on it. Another theory that adds up to it all. And it makes sense given how a "certain someone"™ breaks the 4th wall. I might even go so far as to call it the break of the (4th wall)²
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Well, thing is, a lot of characters break the 4th wall and it's hard to know when it's "serious" and when it's tongue in cheek.
Okay, a lot of theories emerged here. I read all your posts guys, but I have trouble understanding some things. This might be because I am still at chapter 1, just after the beach event. But I do not mind spoilers, in fact, I am always curious about them. So, can anyone summarize what is exactly going on?
I think that before coming up with the big picture, it's important to have solid answers to smaller questions.
Is MC randomly isekai'd person, like he seems to think? Not likely. Maya seems to prefer it to be this way.
Why? Maybe it's easier for her. She Is visibly shaken when MC makes choices, that would indicate that he have inherited memories of OG Sensei.
Who was OG Sensei? One of the previous incarnations? One of the "Players", going through this vn? An NPC gone rogue? An actual person, wired up to a life support machine after failed suicide attempt and plugged into a simulation for some reason? Maybe he had succeeded and now is in purgatory.
How current Maya related to Happy scene Maya? A new, fixed version? An avatar? Daughter?
Who's narrating? Sometimes it's Sensei, sometimes some other party, an uninvolved observer and sometimes it's hard to tell. Selebus self insert?
Does Sensei really have a memory problems? He sometimes slip things here and there, that would indicate that his memories are still there.
And so on...
It's really hard to summarize what's going on, just play it through.