"What? Oh, I'm human." is Rick's response. That's a relief. You are not going to wake up some morning in his belly.
Or is that a disappointment? That time in the Secretary's belly was rather nice. And he wants your body one way or another. It might be nicer inside him than under him.

Well, no matter. Right now you need to keep Rick talking, and not advancing on you with lurid intent. "But why are you here? The Vice-Principal said you are about certain to get digested."

"That's what going to happen anyway. There are a lot of vores on the streets, so if you want to be in a belly, that is where you will end up. And it is quite nice in a girl's belly. You ever been in one?"

"Yes. The Secretary ate me when I arrived, and it was nice. But she promised not to digest me. You are going to get digested."

"You seem to think that is a disadvantage."

"But..."

"No, really. I'm pretty cool with the idea. Maybe I'd like to stay around a little longer, but we all go some way, and I'd rather go soon in a stomach than later by any other way.
"And according to what I have been told, I will actually survive longer here than outside."

"But you are surrounded by vores."

"Yes, but vores with lots of ways to not digest me. And you don't graduate if you can't control yourself, which means not digesting me. So you will probably swallow me lots of times before I'm digested, and I will be spending a whole lot of quality time in your belly, much more than if some vore just swallows me on the street."

"But the tuition here..."

"...Is very high, for a vore. For a human, it's hardly much at all, at least unless I prove to be a vore, or I graduate, neither of which is at all likely."

"Why is it so much cheaper?" Not that you really care, but it keeps him talking, and talking is talking his mind off ... other things, a fact verified by a quick look below his face.

"I'm not sure. It's some sort of scholarship program. Didn't matter. My parents were kinda freaked by knowing the next time I met a vore, I would not be coming home, and they pretty much signed whatever was put in front of them."

"Next time? You mean some vore has already swallowed you? How did you survive that?"

"Well..." He seems a bit reluctant to tell that tale. Press him? Or maybe tell your own tale to encourage him?