The Devil Is a Part-Timer!, Vol. 21 (light novel)

With the Devil King Castle closed and the war between the humans on Ente Isleresolved, 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 fatherand do the right thing. As the final battle fast approaches, Emi can't help but noticethat the Devil King seems to be in poor health... What hidden truths await Maou andcompany in heaven? Can they really take down a god? And if they do, what willbecome of their lives in Japan?