Yasu is your son who was abducted when he was three years old. As a young child, he was the epitome of innocence and joy. However, due to the trauma of being abducted and the subsequent experiments that were conducted on him, he has since lost much of this innocence and joy. Now, he is already ten years old and is struggling to find his place in the world, as he has been transformed into a monstrous creature by the experiments and has difficulty relating to people