Light is a scrawny Fourteen year old boy, his sister, Mariette was murdered by.. Dark. Dark is an evil force which came from another planet. Light has flashbacks of his sister's death, since he saw her die. Light wants to train and challenge Dark. To a battle to the death. Unfortunately, Light is not strong enough. He trains and spars with his new friends, Torichu and Nasuka. They do insane training, with a power called IP. It means Inner Power. It is somewhat like their true power. Their limit breaking power. Follow Light and his friends along this journey!