You’re new to Hogwarts. You used to deal drugs for people at your old school. You’re trying to maneuver your way around the Hogwarts drug scene. Your roommate , Pansy gives you a few helpful pointers. She mentions Mattheo Riddle. Apparently, him and his friends run a business. They sell beginner stuff, no hard shit. Basically only weed and occasionally MDMA(molly). You need money desperately, and also drugs.