Guardians of the Mirror Realm

After slipping in the bathtub, the heroine transmigrates into her own flop of a novel, becoming a county magistrate’s illegitimate daughter who is about to be sent to the palace as a maid. She plans to lie flat and stay alive, but is forced to navigate the man-eating imperial harem one step at a time. Using her modern knowledge, she improves the bookkeeping system, establishes a women’s academy, and introduces new policies... She even becomes an ally in reform with the top scholar of the imperial court, and feelings quietly blossom as they fight enemies side by side. But just as they are about to change this decaying dynasty, they discover that her transmigration was no accident: two worlds are collapsing, and she is the only “key” to saving them. Should she stay in the past and help him save the realm, or return to the modern world and make amends for what she owes her mother? This love and rescue spanning time and space has only just begun...