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...

Zagan searches for the whereabouts of his old friend Marc as the town livens due to a festival called Alshiere Imera. Apparently this festival bears the tradition of giving presents to those dear to you. Zagan and Barbatos have a late start on the festival and mill about in confusion. Stella and Alshiera are completely carefree and are here to play. And for some reason, Kuroka is now a cat? It seems another Archdemon is somehow involved and is hot on her tails!

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?

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.

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.

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!