AU in which Prompto, the omega prince of Niflheim, has to marry alpha!Noctis as a peace deal with Lucis. Noctis doesn't want to marry Prompto since he is in love (or has already a relationship) with Luna, but he is forced to do it anyway.

I just want to see them initially not getting along and slowly falling in love!.

++Prompto falls in love with Noct from the first time he saw him, but Noct only see him as an obstacle between he and Luna.
+++They are pressured to have a baby for the sake of the peace deal.

Pd: sorry for my poor english! :(