Spirited Away RP?

You remember that Studio Ghibli movie Spirited Away? Well, I was hoping to make an RP based off of it. However, I'm not sure what to do for a plot... maybe something to do with after the movie? I want this to be at least mostly OC, but I can make an exception if we need canons. However, I need some suggestions for a plot. Here are the ideas I have so far:

1. After the movie, a pair (or group) of siblings end up in the spirit world (whether or not they are Chihiro's kids is entirely up to you).

2. A new batch of humans end up in the bath house and have to compete against a rival bath house by getting more customers in order to get home.

That's all I've got so far. Any suggestions? You're free to make another plot or add onto/blend one of mine.

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