There Is a Kind of Harem Called De Fei (Lu)

She was a little palace maid with no desires and he was a domineering and stubborn new emperor. They were similar in age and had the same thoughts. The two met each other in their most beautiful years. He could only bully her and teach her how to read and write all night, secretly watching her back, silently feeling sorry for her clumsiness and kindness. She protects him more than her own life and dignity, misses him till she sheds tears every night, and loves him more than her own flesh and blood. She exchanged her whole life for his, and he used his whole life to protect hers.