The Pissed Off Bartender in Republic City

Heiwajima Shizuo is an ordinary guy who lives an ordinary life, he has formed a reputation as the strongest person in "Republic City" who nobody wants to mess with...
Though the people who try to threaten his family and loved ones, they are now either in the Hospital or knocked into one of the other kingdoms...
Regardless, what would happen if the Strongest Non-Bender meets the Strongest Bender?