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Expedition rule
(lemmy.blahaj.zone)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
So, it’s from a science fantasy light novel “Irina: The Vampire Cosmonaut” (Tsuki to Raika to Nosuferatu). The image is one of the posters. It was adapted in to a 2 volume manga and one season anime.