For DDL: http://smdc-translations.com/blog/nira-hatake-nirapii-alice-in-nightmare/
Translated by: SMDC For other releases and DDL, check: smdc-translations.com / http://smdc-translations.tumblr.com/
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Judging by the demon's comment on how she "felt a nostalgic scent from the other world" i'm assuming she's from Makai, although she doesn't look like anyone from Makai that i know so she's probably just a random succubus.