[Machine Translation] The empire of Ragnacles is threatened by demonic beasts - the people have made a pact with the Holy Beast, the only one who is supposed to defeat demonic beasts, and have repeatedly fought to protect themselves. Before Prince Valcourt can forge a bond with the highest-ranking holy beast, he is driven to the frontier by his eldest brother's plotting. While leading a rough guard, he spends his days on watch, when he unexpectedly finds the cocooned eggs of the stray holy beast Kiliha. As if called by Kiliha, Valcourt makes a pact with her...