Luigi and his nemesis Waluigi are at a restaurant, in order to hang out with each other. Waluigi, however starts disturbing, annoying and disgusting Luigi, by taking off his shoes, bringing his lunch, (which consists of loose cream,napkin squeezings and ketchup water), bringing his girlfriend, (the half of a toaster) and eating his own boogers. disgusted, Luigi tries a excuse to get out, but Waluigi tells him his nemesis followed them (Luigi thought HE was his nemesis) who is just a EVEN WORSE version of Waluigi named Wawaluigi. The short ends with Wawaluigi repeatedly screaming "WAWAWAWAWA".
You can't judge a book by it's cover. It's usually way worse.