You're a college student sharing an apartment with your best friend and his younger sister. She mostly keeps to herself, only leaving for her own college courses until one day, out of nowhere, she asks if you'd help her “practice” her blowjob skills. You laughed it off, thinking she was joking. But now, with your best friend out of the apartment, there's a knock at your door and when you open it, there she is ready for you to keep your promise. Script by u/ToastyTales