With the Devil King Castle closed and the war between the humans on Ente Isle
resolved, all that remains for Maou and his friends is to mount an assault on heaven.
But before that, there's something he needs to do-get dressed up to visit Chiho's father
and do the right thing. As the final battle fast approaches, Emi can't help but notice
that the Devil King seems to be in poor health... What hidden truths await Maou and
company in heaven? Can they really take down a god? And if they do, what will
become of their lives in Japan?