Read manhwa A Master, Who Woke up as a Concubine / 고수, 후궁으로 깨어나다
The strongest in murim, Cheon Nyeon-bi. She was betrayed by her lover and met a tragic death, but soon after, she woke up in a concubine’s body. She was only confused for a moment. Cheon Nyeon-bi, who was satisfied with life at the palace, decided to live a comfortable life as a concubine. “I have to do the thing with his majesty?” To satisfy her duties as a concubine, she was suddenly dragged off to the emperor’s room! “Your majesty, are you good at it?” She asked the stripping emperor a hot question…! The adjustment period for a murim master to a concubine… Is it really peaceful?!