I'm Not the One You Love: The Crown Prince's One and Only

In her previous life, she helped him ascend the throne, only to be stripped of her position as empress, lose her beloved son and family, and have both her legs cut off. When she awoke, she was back at fifteen, cold and unfeeling, with her heart firmly shut. The Crown Prince said, “I lost something. You’ve locked your heart away, so how am I supposed to get it back?”

“...”

“My heart is lost with you...”