I'm looking for historical dramas where there's a very positive relationship between family members. Not necessarily the whole family, but siblings for example. Also their relationship doesn't turn sour as the story progresses and it should be at least somewhat relevant to the plot, not just a quick sidenote. I'm also open to suggestions about dramas with relationships between characters who aren't blood-related but become like a family. For example, in The Long Ballad the main character had a young boy that became almost like her little brother.
Please, when you suggest a show, tell me which family members have that kind of a relationship in the drama. Thank you. :-)