Hy! I cant remember the name of a shoujo manga about a prince and a saint? who where married as a way of ceasing the war between two countries, because they were liked by the people I think.
The prince was the second in line for the trhone and the saint? was a girl with some medical knowledge and treated and helped soldiers of the two countries I guess.
The dont like each other too much but put on a facade that create the image of a "dumb couple" and the FL is compared with a Teru Teru Bozu sometimes.
Ring any bells?
The father is already an adulterer ass, the "mother" clearly an envious woman, and making her daughter into a white lotus. Even the fiancee is already looking away!
The only one still decent is Emilio!
Girl forget all of them! Live happily with the people who care about you and get angry for you!