 If you liked
Texhnolyze
|
 ...then you might like
Aoi Bungaku Series
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Aoi Bungaku and Texhonlyze are different in very many ways, they tell completely different types of stories.
However both of these shows nail the dark, depressing atmosphere.
They both make good use of muted colour palettes.
Both tell very adult stories (although completely different in terms of themes and setting).