In the realm of Toyoashihara, the eternal battle between the God of Light and the Goddess of Darkness rages on. Unbeknownst to fifteen-year-old Saya, she is thrust into this conflict when she uncovers her true identity as the reincarnated Water Maiden and a princess of the Children of the Dark. Trained to favor the Light and despise the Dark, Saya faces a pivotal decision as both sides vie for her allegiance. With the power to awaken the fabled Dragon Sword, the key to ending the war lies within her grasp. Will Saya choose her destiny amidst the shadows of her past, or is she fated to follow the tragic path of her predecessors, the Water Maidens?