My Happy Marriage 03 by Akumi Agitogi
Spoilers for 1 and 2 ahead. The plot thickens!
It opens with a rescue, but even though the culprits are dealt with, settling much of Miyo's problems, she and Kiyoka still must deal with her scars.
Miyo wants to learn more about appearing a proper lady, so Kiyoka recruits someone to teach her.
Meanwhile, there are deeper issues revealed, involving the Imperial family, and the enemies of Miyo's mother's family.