Reteach Common Sense!

A returnee from the different world finally returns back to earth as he finds out that earth was invaded by monsters.

The daily lives that revolve around a young man whom was taught on the way of fighting, battle and magic. Yet, had no idea on how common sense work. A comedic adventures of a young boy destroying common sense everyday...
...........................................................................................................................
This is not mine
the original author is ArcadiaBlade from wattpad