Your Name is Maou

Lyla, the king's helper, takes it upon herself to show Yuri and the others around and to help them look for the forbidden box. After many hours of fruitless searching Yuri and the others are told that the box has been found in an old esoteric training ground. However when they arrive at the ruins they find the troops of Big Cimaron waiting to ambush them. Will they escape from this trap and manage to find the forbidden box?