Looking for 2 mangas

I'm looking for these 2 mangas that both share the same theme a older male younger female relationship.

The first manga is set in a medieval time period. She is the daughter of duke (i think) and her engagement was cut off from the prince because he fell in love with another woman. The prince and the other chick have no sense of awareness and protocol as they openly flirt in front of a party full of nobles. The duke's daughter then propose to the older man.

The 2nd manga is about soldier from the capital that is sent a far off town to be the guard. He the marry a young girl whose brothers try stop their relationship.