How Did the Demon Lord End Up Falling for Me?

She was once a fearsome Demon Lord who ruled with an iron fist and wreaked havoc across the land. Her cultivation reached the heavens, and her strength was unfathomable.

Then she was betrayed and left gravely wounded, on the verge of death, when she met him.

Dressed in white as pure as snow, he had not an ounce of cultivation, yet his medical skills had reached the pinnacle.

Then one day, he met her.

From then on, he had a little tail following him around.

"Master, Master, will you marry me?"