Here's a little something that might be of interest...
Republic City Hustle is an American web series trilogy set three years prior to the events chronicled in The Legend of Korra. It explores the history of Mako and Bolin, who, after the deaths of their mother and father, find themselves orphaned and living on the street. The two boys must do what they can to survive on the streets of Republic City, even if that means swindling and theft. - Source