[Machine Translation] Ekaterina joins the fray! Merlin and Merida, what will happen to their journey with their son? Merlin and his party leave their country and set out on a journey, meeting Ekaterina in a certain town. Merlin's son, Slaine, accompanies Merlin on his journey, and gradually grows close to Ekaterina...? The fifth volume of the official spin-off of "The Wise Son"!