they were doing a lot of wink wink nudge nudge shit: "i want you to rely on me forever" etc. which i'm told by a generally reliable weeb is a standard Japanese phrase for "we should get gay married"?
there was also dancing. Arnice puts a ring on Lilysse's finger. the hotel characters refer to them as lovers. there's a scene where they get into bed together and the next morning everyone in the hotel is commenting on how they had a good night.
but it's better than all that because #NightsOfAzure makes it actually textual. they're gay. Lilysse says the L word.
they can still fuck this up before landing, it's true, but i know for a fact that there is a sequel to this game, so neither of the gays are going to die and stay dead.
so i picked up #NightsOfAzure a few days ago and the first quest line is basically that Lilysse is gay and Arnice is oblivious 
i am assembling a package of evidence that this is textual