I think the first fic I wrote for Kpop fandom was Taebin/Seven? Alas, all that early stuff got lost in a computer crash (and then theft), so the earliest I still have access to is OT5 DBSK, which is pretty close to the same time, only I actually published some of that out where I could theoretically claim it back again. (But probably won't, because trash fans managed to chase me out TWICE, so fuck that.)

Uh, the first fic I ever wrote was almost forty years ago and a self-insert Greek mythology MESS that I'm not at all sorry to not have anymore. XD It wasn't meant for anyone else anyway, so it's fine.