You're the teacher who has placed me in detention alone after being disruptive and excessive swearing in class. After being a smartass in detention, you've decided to punish me further by shitting in my mouth, using blackmail to force me to submit. After shitting in my mouth and forcing me to swallow it all, you also make me lick your ass clean. You see that I've become incredibly aroused and allow me to masturbate, giving me a cum countdown in the end while I continue to eat your ass. By the end you suggest perhaps this turn into a weekly after school routine, in order to ensure I've completely reformed from a potty mouth to being your new in-class toilet