You slide down his throat. When you reach his stomach, you stand up. You look up the esophagus and see some light come in through a pattern. You know he's talking to someone. You walk over to the other end of the stomach, where you're suddenly pulled through a little hole.

The next thing you know, you've fallen into a small lake, surrounded by brown! You know you're in the toilet. Then, you're pulled out and washed through the sink. Then the pres holds you and tells you that you'll be fine in 10 minutes. And 10 minutes later, you're fine again, and you hear the bell.
Luckily, you're in the students' bathroom, backpack with you so you can get to class on time. But your class is on how to swallow someone, and sure enough, you're picked as the experiment's guinea pig. The teacher also calls up, guess who, the star pupil, the pres. The teacher pours a serum on you, and suddenly, you smell like steak! The teacher says this is how to swallow someone who smells like they haven't taken a shower in weeks.

And sure enough, the teacher says "On with the vore!" And now, you're back in the belly of the pres. But the teacher makes the pres swallow your homework, your backpack, your pencils, and the anti-steak smelling serum. And as soon as your in, your out back in the pres's dorm. And you leave the other end, but the pres says he loves steak, and you'll be back in his belly soon unless you put the anti-steak serum on.