THE YOUNG LORD OF HOUSE FINLANZ

The Young Lord of House Finlanz summary:

My name is Lizbeth, and I am a 7-year-old who will use the knowledge from my previous life to develop my territory!
Lizbeth was born as the daughter of Margrave Finlanz. She was married off in a political marriage to Crown Prince Reinhardt as his 10th concubine. To distract herself from her loneliness, she exchanged letters with friends from other countries. However, she was falsely accused of a crime and imprisoned in an underground prison.
With no one listening to her pleas, she drew her last breath alone, but...
"I've returned to the past---?"
When she came to, she found herself in her warm bed, back to being her happy 7-year-old self!
The remote territory lady's coming-of-age fantasy starts with a loop!
Hip Hip Hooray~!

My name is Lizbeth, and I am a 7-year-old who will use the knowledge from my previous life to develop my territory! Lizbeth was born as the daughter of Margrave Finlanz. She was married off in a political marriage to Crown Prince Reinhardt as his 10t