My Life is an Isekai, I think

Katsuo is routine oriented and in his second year of high school, when something weird happens. He wakes up, and going through his usual day, he starts noticing some small differences, and others that are not so small.
Is it a prank?
T.V. show?
...Isekai??

I do write a little as a hobby, but this is my first completed novel. So bare with me! Thanks for taking your time to check it out! I am working on the next part in the series, so there's more to come!
Critiques welcomed and even encouraged.