I think this is it !Hey Hyperzoid and welcome to the forums! I haven't played WoFF, aside from a very small bit, but from what I found it sounds like somewhere near the tail-end of Reynn's Theme. Hopefully someone else who has played this game may be able to chime in if that isn't it, but that's the best I found Good luck and I hope any progress you make you find time to share here on the forums for those of us here who really enjoy fan made projects!
Welcome to FFF!
I love this game so it delights me to see someone else enjoying it.
I never played the Maxima version, so Zack and Serah didn’t appear in my version (I see what they did there with the reference to falling onto the flowers, and also him calling out 'Angel' - I love WoFF for this sort of thing). As for the music, I agree with Miko that it does sound like they’ve used part of Reynn’s theme.
They appear to use that theme quite a lot for relatively cheery and heartwarming scenes and Reynn doesn't always appear in the scenes where it is used, I think.