The art I like.
The story I have seen so many times.

As for the masks. Where do you go with it that hasn't already been done? For masks we've had universal faces, big fake smiles, no faces, smooth faces, glitched faces, morphing faces, etc. (demons faces would be a slightly different piece or slightly different flavor to this one) you could have the masks quickly swapping between the people as they try to act like other people to be accepted.

Looking at the lack of options for something new I say stylize the masks heavily in your style.