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I want to read something dark psychological any suggestions
I like these:
Interview with a murderer
http://www.mangago.zone/read-manga/uruwashiki_shuen/
And this one is very twisted, but also quite violent/brutal (contains rape). So only read it, if you are okay with that:
http://www.mangago.zone/read-manga/kiseki_to_amedama/
It was only one chapter but it made cry a lot