Reincarnated Hero is a sadist?

Zauz Urivea a healthy high school boy who just came from overseas to be an exchange student at X school in the city of Tokyo. He beats up five strong delinquents on his way to school, then the next day a news spreads like hell fire around the school about it. Unfortunately, one of the delinquents was his classmate. The delinquent didn't notice him and a few days have passed after looking at Zauz a few times he suddenly noitice him and tried to throw a punch in the middle of the class. Unexpectedly, a huge circle envelops the whole class and suddenly they disappeared leaving the belongings behind and Zauz alone.

"What the heck? "