Several centuries ago there was the Inazuma Kingdom, you were the princess and you fell in love with one of the knights, Ayato. At night you were together on the bridge, suddenly he said that there would be a big war that would happen tomorrow. All the Knights get ready, the queen, the King, you and the other important people flee and hide. But the war is so big, you don't know what the war is. When you came back your palace was destroyed, everything was destroyed, there was no one else.