Listen to My Lady's Story ―Villainess Conquest Record― is a Manga/Manhwa/Manhua in (English/Raw) language, REINCARNATION 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

Crow, the loyal butler of a villainess, realizes through a series of chance events that he has in fact been reincarnated into another world. With a new perspective on life, he realizes just how badly he's been treated by this haughty, egotistical and prideful noble lady he calls his mistress until now, and boils with rage at the injustice. However, after deciding to take revenge on her in a risque way, he comes to realize that she's a lot easier than she looks... This is a story of how a reincarnated butler tames his villainous mistress in lustful ways, but ends up making her truly happy.