"Original work"/"original fic" is a fandom term / semantic category in some fandoms (non-Western fandoms, iirc?). It doesn't mean the work in question it not actually fanfic. I'm looking for the links I had w/ discussions in regards to this a year or so back. Hope I can find them!

/drive-by led here from unofficialotwnews

ETA: I misspoke, but: - http://fanlore.org/wiki/Original_Yaoi &
http://fail-fandomanon.livejournal.com/37106.html?thread=165796594#t165796594

might shed some light. :)