The war that changed everything It's a Valentine's Day that Kojou won't soon forget! Amid the buzz of crushes and chocolate, dark words arrive on the wings of Glenda, the Dragon of the Swamp. Velesh Aradahl is holding Yuiri and Shio captive! And using them as collateral, he challenges Kojou to a vampire duel...At the same time, the Holy Ground Treaty Organization has deemed all of Itogami Island-altar for The Cleansing and domain of Dimitrie Vattler-a global threat. The only way to get the organization to overturn their decision is for Kojou to defeat Vattler and claim dominion of Itogami Island for himself! But can he do it in twelve hours, before the HGTO has the entire island destroyed?!

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!

THE REVIVAL OF THE TRUE FOURTH PRIMOGENITOR IS NIGH! When Kojou Akatsuki was a junior high school student, he met a vampire named Avrora...and then he saw her again when travelling to the hospital to visit his sister. When Kojou learns this mysterious, quiet girl could be the key to saving Nagisa's life, he helps her escape the Magna Atraxia Research lab. With the arms dealer Zaharias planning to use Avrora in his Blazing Banquet, can Kojou stop the revival of the true Fourth Primogenitor and save Itogami Island?

Kojou and Yukina join forces with Natsuki Minamiya to protect Itogami City from a new threat from the skies--but even Kojou's Beast Vassal can't take this new foe on, and who should rescue them from their predicament but Kojou's sister's friend, a silver-haired girl named Kanon Kanase! But when Kanon disappears, Kojou and Yukina may find that there are some problems not even the world's mightiest vampire can solve!

WHEN ALLIES BECOME ENEMIES, WHO CAN YOU TRUST? New Year's Day is right around the corner on Itogami Island, and everyone is getting ready to celebrate! ...Well, almost everyone. Nagisa, off on a trip to the mainland to visit her grandmother, hasn't been returning any calls or texts. Equally troubling is Yukina's sudden and complete loss of contact with the Lion King Agency. When Kojou and Yukina's frantic attempts to find answers reveal evidence of a magical incident, Kojou decides to risk everything and travel to the mainland to find Nagisa himself. But in hismost desperate hour, an unexpected adversary stands in his way...

Aya Tokoyogi and six other hardened magical criminals have broken out from imprisonment. Their goal--to completely erase the 'Witch of the Void,' Netsuke Minamaya, from existence. How these events will unfold in the Demon District will depend on the actions of the strongest vampire to ever exist, Kojou Akatsuki.

Kojou Akatsuki lives on the artificial island of Itogami, and he has a secret: He's the "Fourth Primogenitor," the most powerful vampire in the world. He's carefully kept this dark knowledge from his family and friends, but one day, a beautiful girl named Yukina Himeragi appears before him and tells him that she knows who he really is--and that she's been sent to...kill him?!