 If you liked
ACCA: 13-ku Kansatsu-ka
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 ...then you might like
Great Pretender
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Both anime have writers who know how to work in foreshadowing into the plot without making it seem too obvious, and classy clean artstyles, themes of wheels within wheels. Great Pretender has a richer supporting cast while ACCA is more plot-driven. The execution of both shows is unpretentious and just a lot of fun.