After accepting Lilith's request for a larger bath, Zagan begins the construction of a grand bath in his castle to reward the services of his subordinates and provide a place of relaxation for Nephy and the other girls. Life in the castle is as peaceful and noisy as ever. However, Bifrons' evil schemes are advancing toward them, and the mysteries of what Alshiera has been fighting against for so long slowly begin to unravel.

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.

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 and Nephy's clumsy cohabitation continues! As they're enjoying their time together, a sorcerer coveting the power of an Archdemon comes charging in, covered in armor from head to toe. Zagan easily repels them, but finds that they're a young dragon girl named Foll. Meanwhile, the church has brought over an Angelic Knight who's rumored to have even killed a dragon to tackle the newly crowned Archdemon... Will our awkward Archdemon and elf ever close the gap between them, or will all the commotion get in their way!?

On to the honeymoon! Zagan has decided to introduce Nephy to Orias both as a means to cheer her up from her anxieties of healing Kuroka's eyes, as well as to gain more information on Archdemon Shere Khan. However, Orias herself has vanished, leaving behind the message, "I'm going to retrieve Azazel's Staff." Thus, the two of them depart for the Holy Cut, the headquarters of the church, to chase after her. And in order to avoid any unnecessary suspicion, they decide to pose as a newlywed couple!

Zagan and the others turn Foll older temporarily to help her grow stronger. However, the ritual goes berserk, and when Foll grows bigger, Zagan shrinks! Following Orias' advice, they decide to attend the Continental Interracial Elders Conference in the Far-East in order to obtain powers aside from sorcery. What awaits them there is a member of the Night Clan, beings who live eternal lives, Alshiera. And somehow, this girl they meet for the first time seems to know Zagan and Nephy...

The world is abuzz as centuries of hostilities between sorcerers and Angelic Knights have been brought to a screeching halt by the now-widespread knowledge of the relationship between Chastille and Barbatos—disregarding whether they admit to actually being in one. Meanwhile, Zagan begins his research into how to destroy the Sacred Swords so that he can free the seraphs sealed within them. At the same time, faced with various challenges like Marchosios’s scheming and the demons’ arrival, he plays his next hand: to begin negotiations with the oldest living Archdemon, Forneus. And who better for the job of dealing with an idiosyncratic Archdemon than the brand-new couple, Shax and Kuroka?

Since they're already all the way out in the ocean, Zagan's group decides to go relax on a beach. Everybody changes clothes, and the men are all dazzled by the sight of the women in swimsuits. However, things take a turn when an Archangel named Michael drops by to deliver news that a sorcerer who slaughtered one of the Archdemons has marked Zagan as their next target!

With Chastille’s birthday quickly approaching, Barbatos is at his wits’ end and goes to his friend for advice. However, at the exact moment, the bewitching Archdemon Eligor appears to recruit him. Shortly thereafter, Chastille witnesses Barbatos spending time with a gorgeous woman and decides to secretly tail them. Tremendously misunderstanding what she sees, she can no longer suppress her own feelings. “That man is mine! Get your hands off him!” It’s finally time for Chastille and Barbatos to take center stage in this volume of Elf Bride!

In order to thank Zagan for building the castle's grand bath, Lilith offers to use her powers to help Zagan and Nephy enjoy a date within their dreams. But will that really work out, considering their devastatingly poor sense of imagination? Meanwhile, the hunt for Shere Khan intensifies as more Archdemons reveal themselves and the looming threat Alshiera has been fighting draws ever closer.