In a galaxy from the unknown, there are two existing worlds. The world of Kousen, and the world of Hyperion.
In Kousen's biggest castle, there lived Kasei, being the strongest of his kind, he is declared ruler of Kousen. He possesses the Orb of Titan that gives it's possessor an incredible power. He was a great ruler, and was respected by all. And yet, with so much power that he had, he became more obsessed with it and is planning on taking over the other world, which is Hyperion. But then from the very beginning of his ownership of the orb, he has been prophesied that a sorceress from the other world is going to be the reason for him to lose everything that he have. This prophesy was told to him, and only him, by the Titan himself. He wouldn't let anyone know of it and he want that particular sorceress to die before she could meet with him. Though he had no idea how in the world would a sorceress take everything away from him, he lied to his fellowmen that the Titan's had a prophesy that a strong sorceress from the other world is about to rise and take over their world. He ordered his strongest assassin to go find that sorceress, and kill her before their world meets war, and prevent death from coming. The only thing he knows about the sorceress is that she have powers that only she have among all the sorceress in Hyperion.
The assassin simply obeyed Kasei's order. This assassin had showed respect to Kasei when Kasei was still that great ruler he knew. When suddenly, he felt no more of it as if like he knew that Kasei was hiding something. He had that feeling that he doesn't trust Kasei any more than he had before. Is it because Kasei had felt weak after knowing of a strong sorceress that is about to destroy and take over Kousen? That it may cause many lives to suffer from a war that might burst? Or is there something else? He knew and he had that strong bind between them for he, the strongest assassin and fighter in Kousen, is Kasei's son.
While in Hyperion, their world is full of fantasies. There are good and bad sorcerers/sorceress and witches/wizards. Though there are ordinary beings with no magic, they all lived balanced in their world.
And thus, the story of the two worlds unknown to each other will collide. As the assassin of the Kousen, warped to Hyperion, to kill a sorceress unknown to him, with a threat that she will destroy Kousen, the world that he love and will protect from anything that would destroy it.
What will happen when these two, the assassin and the sorceress, meets each other?