Gakuto Mikumo is a Japanese author celebrated for his imaginative storytelling and a distinctive fusion of genres. His narratives frequently delve into themes of fantasy, mythology, and the human condition, immersing readers in meticulously crafted worlds. Mikumo's unique narrative voice and talent for developing memorable characters have garnered him a devoted readership.
Yahiro and the others journey to Kyoto aboard Galerie Berith's armored train. There, they hope to discover the truth about Japanese people having transformed into moujuu. The train screeches to a halt when soldiers stationed at Nagoya demand a toll-the Regalia: a crimson gem that is...fusing with Ayaho?! There's no way Yahiro or Iroha will hand her over, but how will they keep everyone else safe and escape a barrage of attacks from soldiers and moujuu?
After giant dragons appear above Tokyo, the collapse of the nation of Japan begins, and with the arrival of monsters called Moju, the nation is transformed into a lawless land occupied by armed forces and criminal syndicates.
Bound by his contract with Galerie Berith to hunt dragons, Yahiro heads to the Fortress City of Yokohama, which is under the control of the Guild--a neutral organization that acts as an intermediary between private military companies. There, he finds the swamp dragon medium Nina Himekawa and her Lazarus, Hisaki Minato, waiting for him. Then, Waon Iroha is invited to collab with a streamer backed by a European enterprise named Gibeah. Although she is initially overjoyed at this news, things quickly become complicated when she realizes the corporation is connected to the Japanese Council for Independence, who mean to take their country back...by any means necessary.
Iroha's channel surpasses a million views overnight when a sleuth streamer called Yamadou exposes her as a dragon medium on his channel! Now it's like the whole world is out to get her! Before Yahiro and the Galerie can do anything to retaliate, the Guild detains Yahiro...as a suspect for serial murders?! With Yahiro out of the way, a foe with an old grudge launches an attack on the Galerie's Japanese branch. Iroha and her siblings are more vulnerable than ever!
To close the Keystone Gate and seal the portal to Nod, the Japanese government calls for the destruction of Itogami Island, dispatching Yukina and Natsuki to the bottommost layer of the structure. But when the time comes for her to pull the trigger, Yukina wavers between following her orders and saving the island she loves. In the midst of this predicament Kojou--having regained his vampiric powers--shows up to oppose her. The story of the world's mightiest vampire and his Watcher finally draws to a close!
With the arrival of the Primogenitors, the Electoral War for Itogami Island plunges further into chaos. Shio and Yuiri head to the island intending to use Twelth Primogenitor, Avrora, to put an end to the conflict, only to come face to face with Second Primogenitor, Fallgazer. While Yukina rushes to the island to save the three, elsewhere Kojou is suddenly overcome by inexplicable hunger and thirst, which is apparently tied to the Beast Vassals that resonate with the Primogenitors. Just what will Kojou have to do to regain his strength and stop the Beast Vassals' rampage?
Kojou has finally defeated the Blood, but with Ren abducting Avrora and fleeing to another world, there's no time to celebrate. And with Kojou's vampiric powers gone, staging a rescue seems impossible...until the First Primogenitor, Ki Juranbarada, shows up with a striking proposal and a tempting offer--a new set of Beast Vessels. But when Juranbarada's gift transforms Kojou into a monster devoid of reason, it's up to Yukina and company to find a way to save him before it's too late!
"Demon diplomacy is hard work ... There's a celebration to be had in the kingdom of Aldegia, and Princess La Folia invites Kojou to join in the festivities. Reluctantly accompanied by Kanon, he travels to the royal palace for the signing of a peace treaty between Aldegia and the Warlord's Empire. Not all are in favor of the agreement, and many hold their breath in anticipation of violent opposition. Unfortunately, these fears are realized when a large-scale terrorist plot brings a deadly monster to the heart of the nation, and as luck would have it, Kojou gets caught up in the chaos!"--Provided by publisher
After quashing the rebellion in Aldegia, Koujou and his friends return to Itogami island to find that in their short absence, there has been a violent upturn in the status quo! The Gigafloat Management Corporation has been hijacked, and war brews between the demon clans for control of the territory. And once again, the Fourth Primogenitor has been drawn into the heart of the conflict, al while the perpetrator's true intentions remain unknown!
NO REST FOR A PRIMOGENITOR…It’s a new term at Saikai Academy, and fortunately for Kojou, hehasn’t been held back a year! Freed from his constant work defending Itogami Island, he is ready for some peace. However, an entirelynew demon beast appears, and when Rui and Yuno are dispatched to deal with it, they are gravely wounded. Kiriha forms an unlikelyalliance with Shizuri, who is dead set on avenging her friends. Meanwhile, the Japanese government has concerns about Yukina’s ability to continue observing the Fourth Primogenitor, so the Lion King Agency readies a replacement. As Yukina frets over this threat to her position, her stress only grows with the arrival of a mysterious girl who looks exactly like her!