I Transmigrated To Demon King Of Harem? is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

[ I am Holy Maiden, Even if you use strange spells I will not give up, and continue to resist the coercion and temptation of you demon lord! Whether it’s strange potions, special seals, mental hypnosis, just use them all on me! ] [ I am Lu Xiu, Demon Lord, I am determined to change my destiny, Who will be destroyed as a villain! So you Holy maidens, dwarven princesses, Dark elves, and Valkyries won’t be able to fight me! ]