The world was once ruled by demons.
And the sky was constantly covered with black clouds, as if it were a book; and the earth did not grow crops; and the water withered; and the hearts of the people were clear. Hungry animals were violently attacking people, humans continued to fight and struggle among themselves, and nature was relentlessly ravaging them.
One day, a goddess came from heaven to save the world.
The goddess cooperated with the king who ruled the land, and fought with the devil seven days and seven nights, and finally succeeded in sealing the devil deep in the earth.
But the demon was sealed. I don't know when it will come back.
Therefore the goddess made her own son, born between her and the king, as a 'Son of God' to keep the seal. And he divided his power and his soul into seven parts, and entrusted them to seven knights.
This is the legend of the Son and the Knight, passed down to the Kingdom of Prospere.
And every year in this country, the "Shinto Festival", which mimics the legend, was held for two weeks, largely.