The Boy Who Became the World's Strongest Sorcerer Enjoys a Day Off

During the practical training in Kafka's Forest, Ray defeated a giant monster that attacked him. However, a mysterious magician transforms the monster into a more ferocious form and revives it. Ray, who attacks again, cooperates with Amelia, Elisa, and Evi-Armstrong, and succeeds in repelling this time. Thanks to the fierce battle, the four of them achieve the top results in their training, but... After that, Ray, who returned from training, visited his former master, Lydia Ainsworth, who was a magician of his predecessor, "Hyoken"...?