 If you liked
Brigadoon: Marin to Melan
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 ...then you might like
Flip Flappers
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In both of these series, a normal girl has to deal with what seems to be an alternate world and struggle with individuals from said world as well as themselves.
While Brigadoon does not have the magical girl trope, it does have a similar mood to Flip Flappers mostly due to the cute artstyle, cheerful music and how the story progresses and how the characters elvolve throughout the series.