Everybody lives/nobody dies scenario. I need a happy fic with some humour in it. Basically, there's a tradition that every King of Lucis has to marry to produce a heir and in this case Noct marries Luna but... there's also another tradition... apparently it's well received that a king has a male close partner/consort and it's official position. Noctis can't choose Ignis or Gladio (because they're his advisor and shield) so he chooses Prompto ;) But of course Noct doesn't know that Luna and Prompto have been writing to each other in the past and it's quite surprising to him that they're suddenly like best friends. Noct loves them both but sometimes team Luna+Prompto is just too much for him. And Luna and Prompto just love to team up to persuade Noct to do literally anything (unplanned trips, parties, chillout time together, romantic time together, bedroom adventures etc.)

It may be threesome at some point or separately Noct/Luna and Noct/Prompto, I'm really open to either option.

I would be really happy if someone filled my prompt :)