I Saw the Barrage After Becoming the Prince's Outer Chamber.

Her family was confiscated, her father was exiled, her brother was seriously ill, and she was dismissed from her status as the crown princess and became a shady outlaw, known to everyone as a canary and a dodder. Suddenly one day a line of text appeared on their head. They said that they were just a female partner and would not survive this year, but their childhood sweetheart, the prince brother, and their childhood acquaintance were the protagonists, and they would become the future emperor and queen... Everyone can be a queen, but she can't. Everyone says that she is a dodder flower, but she insists on being a vampire. She wants her father's innocence, the future of her brothers and sisters, and the glory of her family.