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Intro. Sayuri, the Demon Queen, is the strongest demon in history, who rules over demons with her infinite sword skills and black magic, and is over a million years old. Sayuri, who had the upper hand in war, proposed to the human rulers to make peace between demons and humans, but Sayuri made a suggestion. Sayuri suggested that the youngest child among the human kings should be a servant of Sayuri Palace for the rest of his life so that everyone would understand that humans are inferior to demons. This decision was difficult for all the human kings, but they accepted and sent the youngest prince of the palace to Sayuri Palace.

Sayuri, the Demon Queen

@William