Master of Both Medicine and Poison: The Dark, Cunning Demon Lord Won't Leave Me Alone

Betrayed by the person she trusted most, she suddenly transmigrates into another body! She becomes the ugly, useless eldest daughter of the Mu family. From then on, the useless ugly girl transforms into an unparalleled beauty and supreme powerhouse. Alchemy, poison-making, artifact forging, formations, beast taming: she can do it all with ease! Divine beasts! Divine artifacts! She can have as many as she wants! But can someone tell her why the Demon Lord, feared by everyone and known for keeping his distance from women, clings to her every day and takes such tender, thoughtful care of her...