An Archdemon's Dilemma: How to Love Your Elf Bride Novel Volume 13 was written by Fuminori Teshima and illustrated by COMTA.

After months of relative peace and quiet, things aren’t looking good for our heroes. It appears that Bifrons’s plans are finally coming to fruition. Not only has Nephteros been possessed by Azazel, but thanks to that, Alshiera has vowed to kill her. Gremory has gone missing, and Kimaris has disappeared in search of her.

Everything Zagan loves and cherishes is at stake. An army of ten thousand resurrected heroes looms in the distance—it is time for an all-out battle between Zagan and Shere Khan. And most importantly, Nephy wants all of this resolved in just three days so she can still throw Zagan a surprise birthday party.