
But the thing is omegaverse never existed on his world so..... huh..... HUH is this some sort of parallel loopy loop???

in this, the only world mc's ever been in was the omegaverse. the world he thought he came from was dissociation he dreamed up before he & ml got bounced back to the beginning. it's not a time loop in the traditional sense, bc they can & do change things and carry over knowledge. and apparently sketchbooks.

it's a bit confusing, i get it. i'll try a little more broken down:
mc didn't read a novel. the "novel" is reality. his calm life in an ordinary world without ABO is imaginary. he's always been from this onegaverse world.
the time loop-like thing is the "regressor" trope. it's like loading a game's save file and trying different things untill you achieve the desired ending. so it's not a true time loop, bc in a true time loop, nothing can be changed.
The dialogue ITS SO EFFORTLESSLY FUNNY