Do you maybe know of a manga where he king of the angels marries a princess of the devils ...

Do you maybe know of a manga where he king of the angels marries a princess of the devils and she has a brother who marries the sister of his brother in law? they both meet when they are kids but then they didn't have genre like female or male they could choose their genre. After they married there was this issue about demons because they don't have a soul and they end up living between the angel kingdom and devil kingdom. sorry you can ask me to explain it better