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pokoko on 23 May 2017
This is pretty funny. Only two chapters out but it looks like it's going to be updated at least through the first volume (who knows with manga, though).
Satan is about to renew his war with humanity, as his seal has broken and a new Hero has been born. This time he decides to capture humans with planning ability and ends up with a secretary so capable that it even scares the demons.
Maou no Hisho (Satan's Secretary)
