How Did I Reincarnate as a Demon King and End Up a Dragon Girl?

[System, Gender Transformation, Bratty Girl, Pure Love]

After dying from overwork, Mu Yan is reborn in another world. The good news is that he gets a System and becomes Lias, a Demon Lord who rules over part of the world. The bad news is that he is born into a hero's family and is imprisoned from the start.

“You lousy nobody of a hero, let me out!”

“You don't get to decide that.” With that, the hero, Lyle, covered Lias's mouth.

“!?”