はたらく魔王さま! 4
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Editions/Publications:
- 2012 . はたらく魔王さま! 4 (2012, 029, アスキー・メディアワークス, ISBN-10: 9784048863445, ¥590, 353 pages, Paperback, Novel)
From Author Wars - https://authorwars.com/books/hatarakumo-wang-sama-4-2945615.html