Wow. This is so well done. It opens with a beautiful moment of tranquility. Beautiful chords too. Getting to the part where the pace is slowly moving up. Excellent mix and sound design. Oh and those horns. Lovely! I can just see this couple running down a crowded street together and the camera slowly panning upwards to follow where they are going. It's so beautiful. And those lovely string and violin flourishes too. It's like one of the characters is the violin and the other is the string and they just interweave so perfectly.
Masterful. I'm thoroughly impressed.