[Question] Can't remember anime movie name, help me

[DrTenma]

it's a movie, not tv series. I don't remember much, there were kids they go to a village by train or bus. a family in the village wanted to torture these kids. I'm not sure of torture they may have wanted to cast bad spells or something like that on kids. the same family was giving the kids spoiled food. the kids were trying to escape from this family. I think I also remember the school scene. the teacher harassed or beat one of the kid. the main character was a girl