Alright, this one got me., was sure the girl was about to bamboozle everyone
I'm surprised prince brat is just going along with it, he should at least suspect that this is just a trick
I'm not sold on the MC is gonna doom them all theory. He only goes off the rails when he's really cornered, which shouldn't be the case here.
Actually aren't there two keys? That's how MC and girl could both escape