Megasameru to Hyakunen-go no Koukyuu deshita: Koukyuu Jijo Kougyoku

Bullying, intrigue, curses, hot pot parties, and a budding romance!? A headstrong, powerful struggle of a palace maid Lin Xing was enjoying a pleasant life in the palace as the Empress's maid. During a banquet celebrating the Spring Festival, she stepped into a newly built tower and was instantly cursed, falling into a hundred-year sleep—awakening in the arms of a handsome man who looked exactly like her fiancé! She changes her name to Hongyu and begins serving as a palace maid again under the aunt of this man, Cai Chujun, a concubine of the harem. With the help of her fellow maids and low-ranking eunuchs, and even involving Chujun and the Emperor, she uses her past knowledge and innate survival skills to fight against a century-old conspiracy! (Source: Futami Shobou, translated)