Based on the provided search results, here are some recommendations for novels with similar settings to "noble and commoner girl":
1. "Killer Rebirth: Assassin's Rebirth: The Dual-faced Princess of the County Prince: This novel is a reincarnated story set in the palace with elements of romance and intrigue.
2. "Reversing the World: The Medical Consort": This novel follows a female provocationist who possesses medical skills and intelligence as she rises to power in the palace.
3. "Reborn as the Wrongly Married Official Wife": This novel tells the story of a woman who is reborn and must navigate the complications of her new life as a married woman in the palace.
4. " Rebirth of a concubine's daughter: Rebirth of the Commoner Girl: The Unyielding Poisonous Wife: This novel features a commoner girl who is reborn and becomes a strong-willed wife in the palace.
Please note that these novels are in the genre of palace intrigue or classical fiction and share similarities with "dukes and concubines." "
She might have social accomplishments like being an excellent hostess, charming guests at the duke's manor. Maybe she also has educational achievements, being well - versed in literature, languages, and history.
It could be that the duke had something she needed or that she was sent on a mission to interact with him. Maybe it was to uncover a secret or gain important information.
There could be multiple explanations. Maybe it's to protect someone or achieve a greater goal. Or perhaps there's a misunderstanding that's led him to act this way.
A daughter-in-law manhwa often focuses on family dynamics and the relationship between the daughter-in-law and the rest of the family. It might have elements of drama, romance, and sometimes comedy.