Vinyl Scratch's irresponsible and wasteful lifestyle has gotten on her house-mate Octavia's last nerve. That unicorn needs to be taught a lesson, and fast. But how do you make somepony who hasn't even taken care of her own trash before be taught to take chores, house upkeep, and the feelings of others seriously?
Give them a problem they can't ignore, that's how, and Sweetie Belle is the perfect filly for the job.

Inspired by a comic. I can't remember the name of it, though.