I Was Wrong, My Lord. I Only Loved You After You Died

Ancient setting + transmigration + romance + emotional push and pull + belated devotion (he falls in love with her through her writing) + winning her back

The Prince’s favored concubine, Madam Shen, “died.”

Everyone in the Prince’s household merely sighed that it was a pity. Prince Xiao Yun did the same.

Everyone quickly got used to her absence, and everyone assumed the Prince would soon forget all about her.

But later, that composed and restrained Prince began reading the words she had left behind as if addicted. He kept all her belongings in the residence and moved into her courtyard, just to feel her presence.

Later still, he traveled across the land, searching for any chance that she might still be alive.