El reconocido novelista y propietario de la librería Fantastic Kamiyama, Touma Kamiyama se despierta después de presenciar el mismo sueño, ¡donde Wonder World invade el mundo real! Allí, en medio de una guerra entre varios Kamen Riders, Touma no puede salvar a una niña que suplica ayuda, ¡hasta que de repente fue salvada por un espadachín! Un libro Wonder Ride quedó en manos de Touma mientras se preguntaba "¿Por qué tengo esto?" "Creo que me estoy olvidando de algo importante ... Algo que debo hacer". Touma toma a su editor a cargo de su último manuscrito, Mei, para que le presente una copia de su libro a Ryota cuando esté en la ciudad por su cumpleaños. En ese momento, el color del cielo cambia repentinamente, ¡cuando comienzan a suceder cosas extrañas! ¡El mundo tal como lo conoce Touma está a punto de cambiar ante sus propios ojos ...!

¡Touma Kamiyama, confiado con los poderes de la Espada de Llamas, ha salvado a la ciudad de un terrible incidente! ¡Pero los misterios que rodean la espada, los libros y este extraño mundo nuevo solo se hicieron más profundos! Pronto, Rintaro Shindo aparece ante Touma, actuando como un espadachín de la organización Sword of Logos, que ha estado protegiendo estos "libros imbuidos de poder" desde la antigüedad. Después de llevarlo a la Base Norte de su organización, ¡comienza a revelar algunos hechos increíbles a Touma!

¡Después de que el joven que entró a la librería en un león azul entra otro joven en una alfombra voladora! El nombre de este joven que comienza a hablar directamente con Touma Kamiyama es Kento Fukamiya, ¡y una vez fue amigo de la infancia de Touma! ¿Podría estar al tanto de los extraños sueños de Touma y los eventos de lo que sucedió hace 15 años? ¡Además, otro nuevo espadachín también aparece cuando Touma y Rintaro corren hacia la escena! Su nombre es Ryo Ogami, un espadachín de la Tierra que empuña una gran espada y corta ferozmente a Megiddo como Kamen Rider Buster. ¡Sin mencionar que también es un espadachín con un niño!

A pesar de derrotar al Megiddo, ¡la ciudad aún no ha vuelto a la normalidad! Touma le promete a un preocupado Ryo Ogami que extraña a su hijo Sora, ¡que lo recuperará! Los sentimientos de Ryo se manifiestan hacia Touma al decir "¿Entiendes lo que sienten los padres?" A pesar de esto, Touma todavía promete cumplir su palabra. Sintiéndose frustrado y lleno de emociones intensas, Ryo busca informar al sabio de lo ocurrido. El caso de Megiddo sigue siendo un misterio, ¡¿y dónde desaparecieron estas personas ?! Touma y Rintaro reflexionan sobre esta situación con detenimiento, ya que Mei, que se siente responsable de lo sucedido, de repente toma una decisión precipitada.

Kento struggles with his father's demons and wanting to talk to Touma.

Touma meets a swordsman who favors strength over wits, and also a new foe that locks his sword from being used.

Rintarou trains to avenge his master as Touma heads to Avalon to fix his sword.

Ryou is turned to stone during a battle, leaving the other swordsmen to stop Medusa without him.

Touma learns that everyone has their own role to play as he must wait for Daishinji to finish maintaining his new Wonder Ride Book.

A woman from the southern base gives a Wonder Ride Book to Kento, who makes an oath with Touma and Rintarou.

Kento is determined to find Calibur and find out what happened to his father.

Rintarou is dealing with injuries from his prior battle and Ryou is worried that Kento is going to do something stupid.

In order to save Kento, Touma and Rintarou head out to fight Calibur.

While the swordsmen mourn Kento, Calibur reappears for another battle.

Calibur and Saber race for the Table of Contents as the rest of the swordsmen continue their battle.

The gang is preparing for a New Year's celebration when Touma gets an offer from the Southern Base.

Touma is depressed from losing his companions while the Sword of Logos are torn on whether to trust Touma.

Touma tries to find a way to save Yuki; Rintarou and Daishinji see Touma protecting a Megiddo.

Touma meets a young man who likes building models; Daishinji wants to learn the true intent of Yuuri.

Touma learns of people gone missing after seeing fantastical things; Yuuri want a normal form to fight with; Daishinji challenges Touma.

Mei gets a call from the girl that Touma saved and the two discover that her sister is missing.

Touma and company plan to sneak into the Southern Base to meet with Master Logos.

Ogami receives some needed advice from his son; Reika blatantly lies to the swordsman about Master Logos' words.

Touma has a terrifying nightmare about Primitive Dragon; Mei talks with Rintarou as Reika heads to the Northern Base.

Kento is back and determined to seal all of the swords to stop the world from ending.

Touma trains with Primitive Dragon in order to save the boy in his visions.

Mei is tasked to ask Touma about writing a sequel to one of his stories; Ren leaves the Sword of Logos to join with Kento.

Rintarou tells Mei that he's going to fight with Touma, but still has unfinished business at the Southern Base.

Everyone welcomes Rintarou back to the Northern Base when Mei suddenly goes missing!

Rintarou is hard on himself after losing everyone he called family, including Mei.

The barrier to the Northern Base has been breached, letting in members of both the Southern Base and the Megiddo.

Touma and Rintarou head out to retrieve Kento and Ren while Master Logos schemes to get the remaining swords.

In light of Luna appearing before Touma, Master Logos unleashes an old friend of Yuuri to ensure her capture.

Touma is reunited with Luna, but she is quickly taken away again.

Master Logos declares himself God as he unveils a new book to fight Touma.

Touma learns that Kento plans to sacrifice himself to save the world; Yuuri takes Mei to try and change the mindset of his old friend.

Touma pleads for Kento to fight with the other swordsmen as they battle Master Logos.

Touma is able to win over Kento, but there is still unfinished business with Ren and Master Logos.

Tassel meets with Luna; Master Logos makes the swordsmen fight each other.

Tassel makes a visit to the Northern Base to fill Touma in on a few things.

Touma waits for Tassel to return with Luna, but an old friend finally catches up with him and he never shows.

Touma learns that Luna has not been captured; Ren battles Desast.

Storius unleashes the biggest book to overwrite the world; Touma is reunited with Luna once more.

Ten swordsmen head into a long and restless battle.

Touma comes face-to-face with Storius as the other swordsman participate in the fight of their lives.

Touma falls at the hands of Storius as Luna rushes to find him.

Touma and Kento encounter a reminiscent trio who are being targeted by a monster that is being hunted by a strange man with a demon inside of him.