Started from practicing sword in the countryside of the second dimension

In the past, I was surprised that the protagonist after traveling through time could not recognize the protagonist in the animation.
The explanation they gave was that the two-dimensional characters were different after becoming three-dimensional.
After crossing, I want to declare loudly
In the two-dimensional world, he is really a two-dimensional person.
The sky is blue, the clouds are white, the grass is green
But just adjust the color tone slightly
Look, everything in this world looks super two-dimensional!
And I am no ordinary person after traveling to this two-dimensional world.
Because I have my own point adding system
Do you understand what I want to say?
With my supreme wisdom, with my endless talent