She is Empress in Nara period.
The name is Koken Empress(孝謙天皇).
He is a mere Buddhist monk.
The name is Dokyo(道鏡).
Actually the Empress always felt lonely.
But She could not date with other guys because of her position.
One day the Buddhist monk tempted her.
She could not resist his temptation…
This is real story in Japanese Nara priod.
After that he got great success in his life by her favor.