The first among the myth songs from the Singing Hill ~Ar=Ciel Ar=Dor~ album, this tells a myth famous in the region of Sol Cluster: the story of Raikokubishi, also known by the human name Sieryek. He was the eldest son of the God Koudeinomikoto, who was sent by his father to the land in order to save El Duel from their enemy nation, El Nemesys, in exchange for the life of the princess of El Duel. However, once he descended, he ended being born as the son for one of the El Nemesys ministers and forgetting the mission he was given.