The Snowflower Blooms For Revenge

"Xuehua, a no-nonsense handmaiden seeking promotion in the harem, is one day entrusted with the important task of serving the feared Princess Bailian, an immortal witch from an enemy nation. However, the diligent Xuehua finds that “Princess” is actually a man...! Deciding to cooperate with “her”, Xuehua finds herself embroiled in the harem’s maelstrom of vengeance. From Nishiya Shita, the author of The World is Made of Happy Endings, comes a classic, Chinese, romantic fantasy. The adventure begins!"