An Lingrong's Soul Transmigrates into Ruyi's Royal Love in the Palace

Looking for a Crossover Fic: Empresses in the Palace, An Lingrong’s Story

In the An Lingrong extra chapter, when she transmigrates into the moment she is sent back after being summoned to the emperor’s bed, she remembers that the emperor in her own world was heartbroken and so devastated he nearly died. The empress urges the emperor to visit her. Later, the emperor learns what the emperor in her world did, and in the end she seems to travel back.