If you liked
Umineko no Naku Koro ni
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...then you might like
Persona 4 the Animation
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I know that I got interested in Persona via a friend who also liked Umineko - but they both have "darker" themes, and a lot of the voice cast are in both. Ono Daisuke, Ohara Sayaka and Horie Yui all are in the two of these series.