Sadly ... yes, it's another history lesson. Of course, if you don't want to read this, just go on to the next chapter. But if you want to get some background information on the founding of Avalon, read this.
アヴァロン記録 ~ アヴァロンのスタッフ
Annals of Avalon - The Staff of Avalon
The myriad blades of the fallen god-angel Keythedrian were housed in a staff called avellonis. When certain words were spoken, the staff would release one of the legendary swords. Each blade stored within avellonis would leave a crystal at the head of the staff.
When Keythedrian brought the creation of the angelic race, all of the swords the god-angel created were released from the staff and scattered to the many lands of the Earth.
When the unified Kingdom of Avalon was founded, the angelic regent Aldebaran, as a sign of the angels' allegiance to the Avalonians, presented the staff avellonis - along with the swords housed within that were taken from the Necromancers who plagued the land - to Guinevere, the first queen of the land. Along with the staff, Aldebaran presented Guinevere with four of the most powerful blades that Keythedrian created - Hikariandagia, Miharoshiandagia, Kaiyôiandagia, and Moriandagia. Those four blades - renamed Sunstone, Moonstone, Heartstone, and Foreststone - were the weapons used by the kingdom's Jewel Riders and Wolf Riders. The staff avellonis was renamed the Staff of Avalon by the people of the kingdom, and was soon called that by future rulers, who bore the staff as a sign of their office.
The kingdom did not know the angelic names of the blades, nor of the history behind them. They did not know that Hikariandagia - Sunstone - was the first blade of its kind created, the one blade that had brought the creation of the angels.
And also unbeknownst to the Avalonians, the Staff of Avalon hid Kuroiandagia, the blade once used by the god-angel Astralægia.
As of this writing, the Staff of Avalon is housed in the keep of the Crystal Palace. For reasons unknown, the swords housed within the staff have been released; their whereabouts are unknown.
This is the last history lesson for quite a while. That means that you have more chapters of actual story to go through! There is only one more history lesson after three or so chapters, then the story will get going. And don't worry, the characters will eventually get to Avalon!