Uragiri wa Boku no Namae o Shitteiru

Reiga kidnaps Yuki and uses him to lure Luka and the Zweilts into his territory. Takashiro discovers Reiga's whereabouts and sends Luka and the Zweilts to rescue him. Hyde is held back by Hotsuma and Shusei, Elegy is held back by Tsukumo and Touko, and Cadenza is held back by Kuroto and Senshiro, leaving Luka to confront Reiga and save Yuki. During the magical battle with Reiga, Luka is badly injured. Then Reiga blasts Yuki, intending to kill him, but Luze who addresses Luka as "older brother" arrives and stops the blast because his understanding was that Yuki is essential to their plans.

Reiga commands Cadenza to retreat by invoking his summoner's right, enveloping Cadenza in chains, which Kuroto explains, will burn through him if he still refuses to obey Reiga's commands. Cadenza remarks slyly that since Reiga already has 2 General-Class Opasts under him, his powers are currently split, making him weaker. Breaking the chains easily, Cadenza turns on his master as befit his title "Master Killer" and they exchange blows. Reiga is overpowered soon enough but as Cadenza readies the finishing strike, Luka appears and blocks the attack, saving Reiga. Telling both Kuroto and Senshiro to escort Yuki back to the mansion, Luka promises Yuki that he will protect Reiga if that is Yuki's wish. As both Luka and Cadenza release their powers in preparation for a duel, the other Zweilts appear. Cadenza aims for a sneak attack at Yuki but is stopped by Reiga, yet again coming to Yuki's aid, surprising everyone. Yuki is even more assured that it is Kanata who wants to protect him and confronts Reiga. However, Reiga mentions that it was just his plan not to kill Yuki so early in the battle and reiterates the fact that Kanata is now gone. As Yuki continues to deny Reiga's words, Cadenza finally asks Reiga where his loyalties lie.

Kuroto asks Yuki to play shogi with him, where Kuroto shares his past of how Senshiro becomes his second partner. Hotsuma and Shusei are summoned to the Kamakura residence.

Takashiro recounts the events that took place 1000 years ago, during the Heian period. The Giou clan was a well-known family who directly served the court and was led by 4 high-ranking personages: Ario, Takashiro, Reiga and a girl named Yomi. Reiga was feared and shunned due to his mixed parentage but he was supported by both Takashiro and Yomi. They lived in relative peace until a summons came from the royal court for the Giou clan to exterminate some high-ranking demons that were accidentally summoned. Takashiro accepted the task and set off from the village, leaving Reiga and Yomi in-charge of defending the village. Before he left, however, he remarked that he would be back to witness the blossoming of the lone sakura tree (representing Reiga) which had not put forth flowers for a long time. The demon-exterminating task took Takashiro longer than he initially thought and as he rode back, he noticed a great fire devastating the village. Hearing from an injured villager that Reiga had disarmed the barrier that protects the village, allowing a horde of monsters to assault the place, he ran to Yomi's room but found her dead. He received the scar on his face as Reiga directed a beam of light while Takashiro attempted to rush to Yomi's side. As Takashiro questioned Reiga as to his motive for burning the village, Reiga remarks that "everything is already too late" before disappearing. Yuki, after learning of the event that ignited the battle, decides to continue participating in it to stop others from getting hurt. It is also revealed that Ibuki and Tsubaki are his aunts; them being his mother, Mizuki's younger sisters. Handing over a picture of Mizuki to Yuki, they reassure him that his birth was not meaningless as he is loved and wanted. It was unknown, however, why Mizuki withheld the name of her husband from her sisters and also the reason Yuki was left at the orphanage.

Yuki is scheduled to leave for the Kamakura residence with only Luka and Tachibana. While the others want to accompany him, they finally acquiesce to Takashiro's order that only Yuki should go to the Giou main house. Senshiro, a Zweilt-in-training from the main family comes to pick up Yuki and his entourage, making a stop on the way to pick up his partner, Kuroto, a prodigy in shogi who decided to quit in order to focus on the battle. Arriving at the main house, Luka tells Yuki that he is unable to enter the residence as certain people wouldn't want him there due to him being a Duras. Yuki assures Luka that he is determined to know everything about his powers, the battle and also of his past life while Luka internally wonders if Yuki would feel differently after knowing about their past. At the entrance of Kamakura residence, Yuki was greeted by the butler of the Giou main house, Fuyutoki, who is the older brother of Aya, the one who manages the Twilight Mansion. Yuki was then shown to a room where Takashiro later enters after completing a purifying ritual.

Yuki is stunned at the appearance of his childhood friend, Kanata, as Reiga. While Yuki struggles to deny the fact that Reiga is trying to kill him, the others try to protect Yuki from harm. Shusei and Hotsuma defend against the Opast twins who recovered from their injuries due to Reiga's power. Meanwhile, Luka is distracted by Fenrir, the familiar beast of Reiga. Luka, Shusei, and Hotsuma all manage to defeat their respective foes and rush to Yuki's side as Reiga aims icicle daggers to kill him. Takashiro appears just in time to shield Yuki. Takashiro and Reiga both use their ancient books to summon powerful beasts which then engage in a furious battle. Takashiro notices that Reiga has not fully awakened and thus manages to overpower Reiga's summon beast, also injuring him in the process. As Takashiro readies himself to deal the finishing blow, Yuki stops him by pleading for Reiga to tell him that their past memories were not lies. Reiga leaves after cautioning Yuki not to trust all that Takashiro tells him.

With Yuki's help, Tsukumo wakes up long enough to warn the others of Reiga. Yuki, Luka, and Hotsuma set off to find Ashley and Shusei while Takashiro handles things at the mansion before catching up. The three enter Ashley's barrier, a suspicious amusement park where her stuffed dolls attack them. Luka takes care of them while Hotsuma and Yuki continue on. They run into Kanata, who tries to persuade Yuki to forget it and come back with him. Yuki declines and leaves Kanata. Hotsuma and Yuki finally reach Shusei, who appears to be lifeless.

Yuki sees the scar on Shusei's chest and asks Luka what things he is unable to heal. Luka responds "scars that come from friends". The others are worried about Shusei because he seems unwell. The police come to Takashiro with a missing person case: 8 high-school boys are missing. They seem to think it's tied into the Sleeping Beauty Syndrome. Later, Hotsuma walks Yuki home and flashes back to being picked on as a kid. The other kids find out he can set them on fire and despise him even more. Shusei is his only friend. In the present, Hotsuma finds out his parents have really abandoned him as they want their payment in exchange for him. Yuki runs to comfort him and sees his past. Angered, Hotsuma starts a fire. He flashes back to when he tried to kill himself with his fire, only for Shusei to hold him and convince him to stop. Now, Hotsuma is able to extinguish his fire before it really hurts him or Yuki. Meanwhile, Shusei accepts that he wasn't the one to help Hotsuma and disappears. Hotsuma desperately wants to find him.

Yuki and the others finally make their arrival to the Twilight Mansion at dusk. Upon arrival they are greeted by Aya Kureha and Tachibana Giou, the steward and director of the mansion. Yuki is disturbed by the nostalgic feeling surrounding the mansion, almost as if he has seen it all before.

Having found his place among the Giou Clan, Yuki decides to travel to Tokyo with Luka and the Zweilt Guardians. On the way there, inexplicable feelings well up inside Yuki as Luka sleeps by his side. Meanwhile, the police bring a case thought to be the work of demons to Takashiro in Tokyo, and two new Zweilt Guardians await Yuki at the police station.

Yuki is troubled after his meeting with Murasame Toko and Tsukumo and Giou Takashiro, head of a family with special powers known as the Giou Clan. Does Yuki belong with Takashiro or with the children of the orphanage? Zess kindly watches over the confused Yuki while agents of evil approach. Zess warns Yuki to remain at the orphanage on Walpurgis Night but that night two orphans go missing and Yuki is asked to help look for them.

Sakurai Yuki was abandoned by his mother and left in an orphanage, where he spent his childhood alone. Now, as a high school student, Yuki has recently begun to have several mysterious dreams that leave him with a nostalgic feeling that he has seen it all before. In the evening he receives a letter from an unknown sender that leaves him worried by its contents. When he answers the cries for help of a fellow student, Yuki is almost hit by a truck but is saved by the quick actions taken by a mysterious silver-eyed man.