Somewhere in the middle of Cubic Sea there is a place that no bird can reach, no sailor can see, and even fishes are scared to move around it. Legends say that a little island is found there and best warriors among the cubemon are training on it. Under surveillance of cruel masters they participate in brutal trials, practice in fencing and shooting, fight with cubedrags and other natural enemies. Best students become unmatched warriors and the weakest ones are eaten by cube piranhas. Will you dare to travel to the island, to compete with other students and do your best? Then welcome to the Cubemon Ninja School!