Villain’s 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

While in the world of novels, Tang Yu gains the villain role system. Completing missions yields rewards and a return to the real world. Frustrated by the plot and the heroines who can hear his complaints, Tang Yu tries to remind them that he’s the villain and they should stick to the plot.