A list of the Lewdest Ecchi Manga that aren't just fap material and have a good balance of plot and visuals!
This is a complete list of every manga and light novel published in English by Seven Seas Entertainment. These are either incomplete, ongoing or fully published in English.
There's plenty of manga about Demon Kings/Lords, and plenty more about their daughters. Usually involving a bodyguard who must watch over them or the daughter travelling to the human world. Let me know in the comments if any are...