Guardian of the Delicate

Kylie finds herself reincarnated as a lowly eunuch, serving the downtrodden Hostage Prince Vincent. He is like a block of ice that never thaws. Initially, Kylie's sole aim is to escape the abyssal depths of the palace, striving for survival while protecting the frequently bullied Vincent. However, as time progresses, the once ruthless man seems to fall in love with her.
Before long, amidst rising collision and war, the humiliated Crown Prince Vincent leads an army to clean his past humiliations. Kylie has had thought of marry him but learns of his ascension to the throne and his impending marriage to a princess of the former dynasty.
Disillusioned, she resolves to flee, prompting a frantic search by Vincent. Finally, having found her, he pulls the tearful Kylie into his embrace, whispering intimately, "Kylie, sorry. Please, don't leave me."