The Demonic Empress Traveled Through Time And Became My Boss 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

Should I save my boss who collapsed in front of me or not? If I save her, wouldn’t that betray my resentment for working 996 every day? But if I don’t, who will approve my pending reimbursement claims? Lu Youwei sighed and decided to save his boss. To his surprise, the woman who usually tormented him claimed to be the Empress of the Demon Sect after waking up from the accident and insisted on teaching him the path of cultivation…