Blossom and Buttercup have been teasing Bubbles relentlessly about how she isn't a slut like they are. She's determined to prove them wrong and decides to take matters into her own hands. She finds Professor Utonium alone in the living room and makes a move on him. Professor Utonium is shocked and doesn't know what to do but eventually gives in to Bubbles and lets her start sucking his cock. Blossom and Buttercup catch them and decide to join in. They all start fucking and sharing Professor Utonium's cock until he cums all over Blossom's face