Eustach and Astarte continue their assault, finally launching an attack on the central support of the manmade island. When Kojou learns that Asagi is trapped inside, he's eager to save her, but his inability to control his own Familiars holds him in place. Unable to see him go on like this, Yukina makes a suggestion he never expected...

Gardos the terrorist has reawakened the ancient weapon, Nalakuvera. Kojou and Sayaka barely escape with their lives, but they fall into the depths of the manmade island. Asagi hurries to analyze and control Nalakuvera while Yukina fights a fierce battle to stop Gardos.

Kojou and Yukina prepare to ambush Possession Mask, the group responsible for the attacks around Itogami Island... but one of the Possession Mask members they see is Kanase Kanon.

Still stuck in Yuuma's body after the mind switch, Kojou rushes to see Yukina and the other girls. At first they're unsure whether to believe him, but after an explanation, Kojou and Yukina try to locate Yuuma in Kojou's body as they draw closer to unraveling the mystery of the witch of the void.

Kojou comes out of the battle with his own body back, but both Yuuma and Natsuki have fallen. The true prison barrier has been revealed along with Yuuma's mother, Tokoyogi Aya, and the other magic criminals who were incarcerated within.

Kojou and company search for Natsuki, whose spiritual powers were stolen by Aya's grimoire and is now missing. Just then, Yukina's surprised voice directs the others' attention to the TV, where Asagi is seen on the live broadcast of the Halloween Fest...

Kojou and Asagi take Sana on board Vatler's boat, the Oceanus Grave II, to protect her from danger. But Kojou's relief is short-lived as he is soon accosted by Vatler's beautiful young maids, and his stimulation is pushed very close to the limit when he ends up sharing a bath with Asagi...

Asagi has been caught up in Kou's attack. Kojou and Yukina rush to save her, deciding to take her to Mimori's lab for treatment... but when they stop at Kojou's place on the way, another personality takes over Asagi's body.

Shortly after Yukina lost the use of Schneesturm Wolfin and received an order to return to the Lion King Organization, Itogami Island begins to fall apart under attacks from a magical beast that consumes dragon veins.

Lucas and Polifonia discuss the abduction with security. Meanwhile, with the two abductees bound and gagged nearby, erstwhile maid and now full-time terrorist Trine Harden discusses their plans while humiliating Kojo. The world is oblivous to the abduction which is kept from the public. On the day of the ceremony, at Trine's command, Kojo boards and takes over the Aldegyrian flagship, the Bifröst.

While Asagi investigates, she is interrupted by Lydianne Didier, who reveals that she is working for the Taishikyoku, managing the LYL program and will protect their systems against all comers. She challenges Asagi to hacking combat and begins her attack. Lilith's spirit awakens early and automatically, contrary to Kazuomi's schemes.

Yukina stalks Kojo as he plays with Yume. A stranger approaches and while chatting her up, half-jokingly accuses her of stalking. He is Gajou, the father of Kojo and Nagisa. Soon after, he leaves the island with Nagisa. On New Year's Eve, Yukina exploits Nagisa's absence to play house with Kojo in his apartment. Motoki arrives with Yume, Kanon, Astarte and Asagi and all visit the temple together. A cryptic message from Nagisa arrives with only a photo of a magic circle in the sky.

Natsuki magically prevents Kojo from leaving her premises. Kanon recruits Nina to spring him. Outside, Kiriha offers Yukina and him a private jet and false travel documents. Her agency is having fun at the expense of the rival Lion Kings. Asagi continues her efforts to leave the island with Mogwai's aid. Lydianne assists, and later the convict Meiga.

Myriad forces continue to converge on the frozen Lake Kannawa. Asagi and Lydianne, riding in the pink tank, are joined by Ibliss, a high-ranking vampire from the Warlord's domain, after he rescued them from flying demons. Gajou and Shio carry the comatose Nagisa across the frozen lake, seeking a haven for her.

The terrorists launch an attack upon the warehouse district. Afterward, Kojo and Himeragi meet the terrorist leader, Senga Takehito, who tries to recruit them. He reveals his beliefs about the true nature of the island, its purpose of reviving Cain, and his plans to oppose this.

At Mogwai’s urging and with Motoki’s assistance, Asagi makes her way to the Keystone Gate in order to end the hacking attack upon the island’s network. Meanwhile, Kojo and Himeragi battle ineffectively against the demons unleashed by the terrorists.

Kojo and the others are helpless by the power of Meiga Itogami's Cleansing ability. Kojo wonders what the hell this Cleansing ability is. At that time, the truth about the Cleansing is passed on to Kojo. Will Kojo be able to protect Himeragi and Itogami Island from Meigawa Itogami?!

Kojo wakes up at Natsuki Minamiya's house. On TV, Asagi and Vatler appear to be working together and declares war against the Holy Ground Treaty Organization. In addition, Asagi says that Grenda will use Cain's legacy that she has protected as her power, to help save Itogami Island. Meanwhile, to save Nagisa, whose life is in danger, Hektos tells Kojo and the others that she will need to hold a ceremony.

With the help of La Foria and Veres Aladar, Kojo broke into the council and declared Itogami Island as his territory as the 4th Primogenitor and gained the right to veto the attack. But for him to be recognized for this, he must expel Vatler from the island and become a true ruler. Can Kojo defeat Vatler, who has absorbed the power of the Cleansing, and save Itogami Island from the crisis?!

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