Another member of the Sword of Logos, Ren Akamichi, visits Touma's bookstore seeking Kento's recognition. When he learns of Kento and Touma's friendship however, the young ninja develops a rivalry with the latter. Meanwhile, Megid commanders Storius, Legiel, and Zooous make their move against the Sword of Logos.

After claiming the King of Arthur Wonder Ride Book and unsealing his sword, Touma begins to doubt if he can master the former's power. After Ryo is turned into stone while protecting him however, he comes with an idea to rescue him with help from his friends.