飛羽真はカリバーを倒し、仲間とともに世界を救った。しかし、上條は新たな謎を残し息を引き取った。既に世界の最後が決まっている。ルナが世界を繋ぐ特別な存在。そして、15年前の事件に関わっている組織の中の真の敵。
上條とは違い仲間と共に真実を明らかにすることを誓う飛羽真。しかし、その裏ではサウザンベースの使者・神代玲花が暗躍していた。そして、飛羽真の前に現れた倫太郎たちは「聖剣とワンダーライドブックを渡せ」と飛羽真に告げる。
昨日までの仲間と戦うことになり戸惑う飛羽真。その時、現れるフードを被った男。
「俺は世界を守る剣（つるぎ）だ！」
その男が変身した姿は何と――
Touma has defeated Calibur and saved the world with his friends! However, Kamijo left a new mystery moments before his death! The end of the world has already begun! Not to mention that Luna is a special being who connects both of their worlds! And a true enemy within the Sword of Logos was involved in the incident 15 years ago! Unlike Kamijo, Touma vows to reveal the truth with his friends. However, the Southern Base messenger, Reika Shindai, was operating from behind the scenes! Just then, Rintaro and the others appear in front of Touma telling him "Give us your Seiken and Wonder Ride Book." Touma is confused because it was just yesterday when he fought alongside them as allies! Just then, a man wearing a hood appears. "I'm the sword who protects the world!" It was in that moment, when this man suddenly transforms...!
