Thousands of years ago, her sister stepped into the human world due to the king's order and met her destined person.
Thousands of years later, she came to the world for fun, but she didn't want to cause turmoil in the demon world and cause trouble in the fox clan due to her whim. After the demon world was pacified, such a legend has been circulating since then:
The fox charms the world, dressed in red, and falling in love for a lifetime.
A witch who brought harm to the country, was injured because of love, and washed the three realms with blood.