Uchi no Ojou-sama ga Hametsu End Shika Nai Akuyaku Reijou no You nanode, Ore ga Kyuusai Shitai to Omoimasu.

Uchi no Ojou-sama ga Hametsu End Shika Nai Akuyaku Reijou no You nanode, Ore ga Kyuusai Shitai to Omoimasu. is a Manga/Manhwa/Manhua in (English/Raw) language, Shoujo series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.com fastest updating comic site. The Summary is

I'm a character in an otome game?! I'm Vincent, the butler of the Count's daughter. One day, I suddenly remembered that this world is one of an otome game that I played in my previous life. Furthermore, I remembered that the lady I adore will die a violent death as the villainess! Huh? Don't mess with me! I'll destroy my lady's destruction flag!! As her loving butler (and a capture target), I'll do everything I can to help my lady avoid her bad end.