Nago offers his resignation to Shima, but Shima refuses, granting him access to IXA’s Rising upgrade as he feels Nago has accepted his own weaknesses. However, the celebration is short-lived when Megumi and Shima are arrested. Nago is informed by the senior officer responsible that his former dealings with the Blue Sky Group 22 years prior led him to be injured by IXA, and in order to save his colleagues, Jiro appears and grants Nago access to Castle Doran’s Time Door, sending him back to 1986 and bringing him face-to-face with Otoya!

In 1986, Rook enjoys his reward for beating IXA and the monsters as Yuri steals the IXA Knuckle and rushes to Rook, who steals the Knuckle and transforms into IXA! The monsters fight back, but Rook overpowers them easily as he runs wild. But when IXA overloads, Otoya and the others reveal their plan, as Yuri becomes IXA to finish off her mother’s killer. Meanwhile, in 2008, Nago discusses Wataru’s role as Kiva with Wataru, who he takes on as his pupil, further upsetting Kengo. As Bishop pushes Mio further into her role as Queen, Megumi discovers her mother’s notes on Rook and begs Nago to lend her IXA in order to exact her revenge…

In 1986, Yuri is happy after defeating Rook and suggests marriage to Otoya, who is taken aback. Soon after, he runs into Maya, who is playing the violin and poses a question to him about her playing before she leaves to visit her infant son. But when Riki attacks her as she visits Otoya to see if he knows the answer to her question, her role as Fangire Queen is revealed! In 2008, Wataru finds an injured Mio, and the two patch one another up, both unaware as to one another’s roles, while Taiga, Wataru’s first friend, and the Fangire King, reappears!

Mio and Wataru discover one another’s identities, along with Taiga realizing that as Kiva, Wataru is his half-bother. In denial, Wataru runs off, collapsing in the woods. Taiga decides to go speak to Maya to demand answers, while Nago attempts to coach Keno in the use of the IXA System, but his efforts don’t end well. In 1986, Otoya visits Yuri and tells her he intends to find Maya, while the Fangire King is confronted by Jiro as he summons a dark version of Kiva to finish off the Wolfen for good.

Now aware that Maya is a Fangire, Yuri encounters her once more and intends to kill her, but Otoya stops her, suggesting a picnic, but she storms off. Maya takes her place, and afterward, Otoya passes the Fangire King, who tracks down the Arms Monsters and agrees to spare them if they’ll kill Otoya. In 2008, having regained his senses after Bishop released his Fangire nature, Wataru relapses into isolation as he fears that he’ll hurt another human, while Nago regains the IXA Knuckle, but finds himself facing Taiga as Wataru ignores the Bloody Rose’s call for Kiva…

The Arms Monsters attempt to eliminate Otoya in order to be spared by the King, but none of them can go through with it and the trio decides to split up and run, but they don’t get before the King uses his dark Kiva powers to seal them into the weapons Wataru will use in the future, imprisoning them in Castle Doran. In 2008, Shima fires Kengo, who begs Wataru not to give up with Nago and the others, but Wataru won’t budge. But when a vision of Maya comes to him in a dream, will he find his resolve to believe in himself?