Two important birthdays are coming up, and surprise parties are being planned for both of them! Neither Nephy or Zagan, however, know a thing about how birthdays are supposed to be celebrated, so a disaster is certainly in the works. The entire castle is in a celebratory mood, but dark clouds are looming over the horizon. There's a terrible problem haunting Nephteros which must be taken care of before any sort of party happens, but Zagan still has no idea how to solve it. What's more, after a month of relative peace and quiet, Shere Khan and Bifrons are finally making their move. Join Nephy and the ever awkward Zagan for all this and more in volume twelve of An Archdemon's Dilemma: How to Love Your Elf Bride!

Nephy learns of Zagan’s impending birthday from Alshiera, which is information that Zagan himself doesn’t even know. Seeing this as an opportunity, Nephy leads the charge in putting together a surprise party for him, but with her past experiences being what they are, she has no idea how birthdays are celebrated. Meanwhile, Zagan also learns from Orias that Nephy’s birthday is coming within the month, and the two Archdemons decide to mark that day as Nephteros’s birthday as well. Much like Nephy, however, Zagan is ignorant of how birthdays work as he tries to plan a surprise for her. The entire castle is in a celebratory mood, but dark clouds loom over the horizon. Zagan knows of a terrible problem haunting Nephteros that has to be addressed before any sort of celebration is an option, and he still has no idea how to resolve it. What’s more, after a month of relative peace and quiet, Shere Khan and Bifrons finally make their move.

Zagan is feared by the masses as an evil sorcerer. Both socially awkward and foulmouthed, he spends his days studying sorcery while beating down any trespassers within his domain. One day he's invited to a dark auction, and what he finds there is an elven slave girl of peerless beauty, Nephy. Having fallen in love at first sight, Zagan uses up his entire fortune to purchase her, but being a poor conversationalist, he has no idea how to properly interact with her. Thus, the awkward cohabitation of a sorcerer who has no idea how to convey his love and his slave who yearns for her master but has no idea how to appeal to him begins.

Chastille's birthday is quickly approaching, and Barbatos is at his wits' end trying to plan for it! While he's on his way to ask a friend for advice, the bewitching Archdemon Eligor attempts to recruit him. Soon after, Chastille catches Barbatos spending time with a beautiful woman and realizes she can no longer suppress her own feelings. Could a confession of love be on the horizon?

A month of peaceful days have passed since Bifrons's hectic evening ball. Having gained many new followers, Zagan's castle is now bustling with activity. After everyone has settled in, Nephy asks Zagan if she can visit her old home to find information on high elves. As such, the group heads off to the northern holy lands, to the hidden elven village, but somebody is already there awaiting their arrival...

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. Join the ever awkward Zagan as he is forced to protect those he loves in volume thirteen of An Archdemon's Dilemma: How to Love Your Elf Bride!

It's Lonely at the Top! Upon inheriting the Sigil of the Archdemon, Zagan suddenly thrusts Nephy away from his side. The distance between them was gradually shrinking, so why the sudden change? And who's this guy attacking the local tavern? The one pulling the strings behind the curtains finally reveals themself and chaos ensues as the truth begins unravelling.