Tensei shitara Koutei-heika ni Neko-kawaigari sareru moyou desu.

Lucia is the only daughter of a poor noble family. She met Crown Prince Lanishion by chance in the forest, and since then, the two have spent time together like childhood friends, transcending their differences in social status. By the time Lucia turned 18, their relationship had developed beyond friendship, yet remained untouched by romance. However, it is announced that Lanishion is engaged to a princess from another country. Realizing their fate as lovers is sealed by their differing social statuses, Lucia, who dreams of marrying the man she loves, cannot let go of her feelings for Lanishion and is deeply hurt. Meanwhile, Lanishion's feelings for Lucia grow stronger, but he is torn between his duties as Crown Prince and his own emotions, leaving him unable to act. Then, Lucia is murdered—!? Years later, Lucia is reincarnated as the abandoned child...