I gave it 20 chapters... Nothing happened, we know nothing about Mc. Nothing about other characters. Nothing about why he became teacher or soldier.
Like you read it and get nothing.
We only saw that he is super strong and he only dealt with one student we know hardly anything about...
Look story should have a plot hook at least in first 5 chapters... And good one should at 1 or 2 chapter...
There was no future goal created, no drama, nothing.
I just wasted time reading guy running around talking 3 sentences and going back to sleep.