Demon Taming Slave: First Divine Beast Demonic Concubine. This was an ancient romance novel. The protagonist was a gold medal killer who had traveled to the Divine Martial Continent at the edge of the Ancient Realm. She was the illegitimate daughter of the Heavenly Emperor. She had overcome many difficulties to subdue the five divine beasts and relied on the favor of the Demon Emperor to do whatever she wanted. I hope you will like my recommendation.😗