Monsters Raid ~Ma ni Ochiru Himekishi~

モンスターズ・レイド ～魔に堕ちる姫騎士～
A long time ago, a demon king led by countless monsters attacked people and terrorized the neighborhood.
At that time, the powerful humans, elves, and dragon races stand up and raise a flag of rebellion against the demon king.
After a tough battle, although he was unable to defeat the demon king, the battle ended with his body sealed.
After that, the human race divided into the plains, the elves into the forest, and the dragon race into the mountains, respectively, uniting the chaotic region.

Then Ikusei Frost.
The three races lived in peace. However, the appearance frequency of monsters increased, and the damage started to increase.
As people’s anxiety grows, a horde of monsters rushes into Gazette Village on the Amusha Plain.
Celica, a princess knight of the Kingdom of Nortoria, a descendant of the hero who once fought the Demon King, runs her horse to save the village with a small army.