 If you liked
Higurashi no Naku Koro ni
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 ...then you might like
Rainbow: Nisha Rokubou no Shichinin
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Both are set in past Japan and portray Japanese society in a negative way, with a focus on how youth is affected by decisions adults make. Apart from that, both are very reliant on shock factor, highly violent and painful to watch at times as well. In both you see what friendship truly means, whether it's hiding a corpse or supporting each other after your best friend was fusilated.