With the unfolding of the story, Arata finds himself forming an unintentional connection with Lilith's Grimoire, known as "Hermes Apocrypha." This connection results in a dazzling white glow and the sudden appearance of Lilim, who declares Arata and Lilith as her parents. In addition, this connection also triggers a mysterious change in the world that awakens the forbidden Eternal Library, which contains the ultimate achievement of Alchemy: the White Demon Lord. The nefarious plans of the White Demon Lord involve the elimination of Arata and the Trinity Seven to seize the position of Demon Lord, and unleashing an insurmountable power that only Arata and the Trinity Seven can oppose. The imminent threat sets the stage for a final showdown to rescue the world.