Outrageous! I opened a training class for empresses 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

Lu Li, An Ordinary Teacher With Amnesia, Managed To Turn His Three Female Students Into A Queen Of Killers, A Queen Of Medicine, And A Queen Of Business?! It Turns Out His True Identity Is An Ancient Immortal Who Lost His Memory And Fell To The Mortal World. Now That He Has Regained Everything, He Decides To Defy Fate With His Disciples And Reclaim His Former Glory!