It's senior year at Hallowearth University!
Play as a young monster who has only ever known life under human rule. Between finals for University and figuring out who to take to the winter prom, not to mention memorizing your lines for the big school play, you already have a lot of pressure to deal with. You've always heard legends of a grand apocalypse where the monsters of the world rose up to rule.....
Like, that was it, though. They got their butts kicked. Humanity won. Somehow. It was really, really embarrassing.
Now there are a bunch of humans invading your school. Okay, nothing so dramatic: they are transfer students from some Shakespeare Liberal Arts college. He was a famous human writer or something. It doesn't matter. The point is that you and your band of friends must quest to find harmony between your two worlds (and there are a buttload of different monster species vs. one human species), and maybe even figure out the mystery of how the current state of thing came to be.