 If you liked
Sci-Fi Harry
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 ...then you might like
Red Garden
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Both of these anime are distant from more common japanese etnocentrism - meaning they are set in America and have zero to none japanese characters, except for that, both are relatively mature mystery shows and in both main character/s realise that they are different than other people and show how they deal with it but also how it changes their relations with other people. If you liked either one of these shows you will most likely enjoy other.