Don't forget, he has just basic knowledge of what being normal means. One of this things is going to school like a regular kid. He probably at this point doesn't even want to switch school's because of the other girls... But the other reason is probably Rua will use her power to stop him.
Yesterday i went to check out a bit more of the family's future in the WN... I was surprised to see that the WN has almost 400 ch and is still going strong! The story is all over the place from what i saw...
Btw a hilarious thing happens when MC came back home after cutting ties.
This is heavily leaning towards them realizing they are not sexually attracted to each other, and that they will break up and go back to being just friends like before.
It looks like an easy Chisaki win...