After My Arch-Rival and I Went Undercover

【Disguised as a delicate green tea fake commoner daughter, actually an assassin x Gentle scheming fake heir, actually a military strategist】 Si Qing was originally the formidable head of the assassination hall in the Qianji Pavilion. In a twist of fate, she transformed into the delicate young lady of the prime minister's mansion, Jiang Xueqing. After lying low for many years, she finally received her ultimate mission from the prime minister: Navigate among the young masters of the Grand Commandant's mansion, win the favor of the future head of the family, and marry into the Grand Commandant's mansion. On the surface, Si Qing smiled gently, but inwardly she felt a sense of foreboding. The...