Basically a bonus scene after the ending of Luna Eclipsed where now everyone accepts Luna in their Nightmare Night event. Then the Princess Of Night gets another surprise from a little Pirate who just said that she was his favorite princess. I think Pipsqueak is never going to forget this night for sure winkwink
And no I don’t think of them as a romantic couple, this is sort of a kid love affect for an adult woman (like Spike for Rarity)