I'm not really sure if the story is just super short or if I missed something, but the endings I reached felt really bluntly cut off and weirdly timed. The dialogue also felt clunky and unnatural at times which isn't helped by the couple of grammar/spelling issues. I also didn't feel much when it was revealed that I was also one of the subjects at the school since I had it in my mind I was a normal human who got isekai'd into the school of subjects. I think focusing on the conversation between yourself and mr math would've been a better path to take in production rather than your internal thoughts. It was also hard to tell when I was talking to mr math versus when I was thinking to myself, so I may be getting some story beats off, which is why the dialogue felt so choppy.
Otherwise, I like the concept of personified subjects running/living in a school. It's a really unique concept that interested me a lot the moment the blue haired guy introduced himself as "math". It'd be cool to see more of it with more visuals, considering mr math is supposed to be hawt I wanna see him :3.