An insular, agoraphobic boy named Wataru Kurenai begins his battle against the Fangire as Kamen Rider Kiva, a battle with connections to a conflict from 22 years in the past...

In 1986, Yuri is ordered to protect a violinist who is likely to be targeted by a Fangire and also happens to be a student of Wataru’s father Otoya. Meanwhile, in 2008, Wataru continues to try and figure out how to make a violin that will equal his father Otoya’s, as he finds himself repairing a violin damaged 22 years earlier…

In 1986, Oyoya flirts with several women before Yuri arrives and they are attacked by a Fangire, where Otoya shows prowess fighting back and generating interest in him by Yuri’s boss. In 2008, Wataru is approached by a lawyer who details accusations against his father and victims of his crimes, forcing him to find one good thing Otoya did in the past to resolve matters with the people who were wronged.

As Yuri continues her investigation of Otoya in 1986, she reports back to Shima, who decides to pass on bringing Otoya into their group. In 2008, Wataru works to atone for his father’s crimes, but he discovers someone who refuses to ever forgive Otoya as she transforms into the Moth Fangire!

After a disastrous attempt to try to warm his neighbors up to him with a violin performance, Wataru pleads with Nago to help him become more confident. Nago tasks him to trail Megumi as her bodyguard, but he finds himself working with a strange man claiming to also be working for Nago!

As a bizarre Fangire attacks mother and daughter in both the past and present, both Otoya and Wataru must save their respective female targets before the Fangire is able to make them his bride!

In 1986, Otoya joins Yuri in tailing Jiro to investigate missing customers from Mal d’Amour, while in 2008, after leaving the hospital, Megumi invites Wataru on a date as cover while she investigates Maison Cercueil, but Nago interferes once again…

Megumi attempts to force Wataru’s attention away from Nago to prevent him from being manipulated as the investigation into the French restaurant continues while in 1986, Otoya tries to solve the mystery of the cafe victims as Jiro continues his attacks.

Wataru gains the assistance of a violin maker in trying to create an instrument that fits who he is while in 1986, Yuri and Otoya try to decipher the curse of a violin and a monster attacking those who possess it. In both the present and the past, talk of the IXA System leads to the appearance of another Rider on the battlefield…

As Wataru learns of Oomura’s promise from 22 years ago and his history with Wataru’s father, back in 1986, Otoya confronts Jiro about the monstrous transformation he witnessed but while following him and Yuri, he ends up face to face with Oomura as the men discuss the craftsmanship of their violins…

Wataru discovers rock music when he’s asked to help a musician with his band while in 1986, Yuri tries to position herself to become the first IXA in order to take revenge on the Fangire that took her mother.

As Yuri demands to know why Jiro was chosen for IXA over her, she learns of the cost of using the still-incomplete system while in 2008, Wataru is injured after the attack by Nago, causing him to struggle with his role in the band…

As Jiro vows to rebuild the Wolfen race, Otoya protects a woman and is severely beaten by him, but in the commotion, Jiro loses the IXA Knuckle, and Oyoya seizes the opportunity. Meanwhile, Wataru continues to help Kengo to achieve his dream while Nago struggles with his loss to Kiva…

After driving Jiro back, Otoya suffers from the side effects of the incomplete IXA System, but he puts on a front to deflect suspicions by Yuri. In 2008, Wataru pleads with Kengo to abandon the mysterious promoter, who he now suspects is a Fangire, but Kengo won’t listen…

After Otoya is knocked out during his fight with Jiro, Yuri recovers the IXA Knuckle and plans to track down the man who murdered her mother. But when she faces the man, she is swiftly knocked out as Jiro arrives and also recognizes him… as the man who slaughtered the Wolfen race. He is Rook, of the Fangire’s Checkmate Four! Meanwhile, in 2008, Wataru and Shizuka encounter Rook, who seems to be suffering from amnesia…

As Wataru and Shizuka try and help Rook, who they’ve nicknamed “Biggie”, recover his memories, he begins spending time with a young woman whose bike he helped fix. Their hope is this might jog his memory. Meanwhile, Jiro proposes an alliance with Otoya to take down Rook and protect Yuri, and Otoya tenuously agrees…

Otoya is tasked with helping a young girl pass an audition, being promised a date with Yuri in exchange. In 2008, Wataru meets an archer named Mami, who takes him under her wing, while Nago angrily pursues a criminal that is also the Seastar Fangire…

Convincing his student that her slump is due to her not playing from the heart, Otoya gives her the confidence she needs to not only pass the audition but to realize where her heart truly lies. In 2008, Wataru loses his resolve to fight, but when he discovers that Mami has been injured by the Fangire, her pep talk about doing what his heart tells him inspires him to remember why he battles the Fangire…

In 1986, Rook begins to target women getting married, and Yuri finds herself face to face with him when he shows up at a wedding she was attending. After his attack, she begs Jiro to let her use IXA, but he continues to refuse while Otoya creates a distraction and steals the IXA Knuckle. Meanwhile, in 2008, Wataru meets with Kengo once more, who is convinced that Kiva will be his inspiration for his music. But when they attempt to learn more about Kiva, Wataru finds himself out cold as his body is suddenly inhabited… by his father?!

As the Ladybug Fangire escapes from the Otoya-possessed Wataru, it takes Kengo and Keisuke as hostages to force Megumi into a fight as IXA. As “Otoya” tries to teach her about the resolve needed to be a warrior, she refuses to listen, and time is running out for the hostages. Meanwhile, in 1986, the actual Otoya runs into a mysterious woman at a wedding while looking for Yuri, who is revealed to be the queen of the Checkmate Four, Maya…

After Yuri treats Otoya to a meal to thank him for what he did during the wedding incident, Jiro becomes angry at Otoya’s affection for Yuri, prompting Jiro to propose to her! Stunned, she isn’t sure whether to accept, but Shima thinks it’s a good idea. In her frustration, Yuri sets up a group date where Otoya runs into an old friend. Meanwhile, in 2008, Kengo suggests to Nago, Wataru, and Megumi a group date of their own, where things go poorly, including the antics of a clumsy waitress…

As Otoya works to help Yumi gather money, the Luxur store manager continues to attack patrons, until Shima explains what’s been going on and a trap is set to catch the Fangire. In 2008, Wataru learns the name of the awkward waitress he met before, and after running into her again, the pair hit it off as Mio asks Wataru on a date.

In 1986, Ramon and Riki’s massage parlor is shut down for operating without a permit, so Jiro arranges for them to work at Mal d’Amour, leading Otoya to give Riki advice on love. Meanwhile, Maya is continuing to eliminate Fangires who have fallen in love with humans, but one Fangire named Shinji manages to escape her as he struggles with his relationship. In 2008, Megumi convinces Mio to model with her when one of the other models is ill, leading Wataru into a confrontation with the Grizzly Fangire!

After Jiro’s attack, Otoya is rescued by Ryoko and Shinji, who nurses him back to health, and he inadvertently repays the favor when he interrupts Maya as she’s about to eliminate Shinji. At the same time, Jiro has taken Yuri hostage and loses control, madly declaring that she’ll be his forever, but the admission she makes shocks him. In 2008, as Ryoko’s illness takes a turn for the worse, Shinji takes her to the tree they planted 22 years ago, but when Nago confronts him, he flips into a rage and attacks Mio, upsetting Wataru and unleashing a new power…

With Jiro’s disappearance, Yuri supports Otoya’s induction into the Wonderful Blue Sky Group as IXA’s official user. But when they plan to seek out her mother’s lost ring, Otoya finds himself suffering memory loss after a battle with Rook, when Maya, the Fangire Queen, arrives and claims to be Yuri! Meanwhile, in 2008, Wataru finds Mio has distanced herself from him after an encounter with Bishop, another member of the Checkmate Four!