An Archdemon's Dilemma: How to Love Your Elf Bride Novel Volume 18 was written by Fuminori Teshima and illustrated by COMTA.

While Zagan makes moves to resolve the many problems piled on his plate, his old friend and enemy, Marchosias, suddenly shows up and calls for all Archdemons to gather at the ends of the earth. Zagan decides to go, and since he's heading out anyway, why not take everyone on a sightseeing trip? Meanwhile, Barbatos seems to be plotting something to do with Zagan and Nephy…