Hmmm I think you may be confused because I'm looking for both works that are straight edge AND/or brutal, by your definitions.
I also don't necessarily agree that a work that is edgy by definition is always perverse- that is often the case for sure, but with something like
Vinland Saga the edge and brutality at the start are needed as framework for the character growth and moral of the story that occur later. I said "unncessarily" edgy to distinguish between something like Vinland saga and something like, say,
MPD Psycho, where the edgyness is the entire point.
I also don't think edginess = trash, as your spoiler indicates, but thats beside the point.
That being said, I've read my fair share of Ero-guro and its not what I'm looking for at the moment. Something along the same lines but not hentai, like
Satanister would work.
Your recommendations of Revenge Classroom and Judas are both works I've read previously that fit the bill, so I'll check out your other ones. Especially Harem end looks like it'll be good. Thanks!
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Does the walker choose the path, or the path the walker?