I'm a new kpop fan that only became a fan during this summer after every single group I like finished their comebacks and promotions >-< so the first one I am here from the beginning with teasers n stuff till the end is Ateez right now!
Not counting Psy’s “Gangnam Style”, it would be BTS’ Face Yourself (Also don’t know if that counts cause it’s a Japanese comeback), so then it would be BTS’ “Love Yourself : Tear”
Oh yes, I remember hearing the song some days before it got REALLY BIG LIKE EVERYWHERE
I really liked it and listened to it on repeat
When I got to school a few days later I was SHOCKED BEYOND MEASURE when I heard the 'cool kids' play that song and dance along to it cause I would have never expected them to listen to korean music
My first comeback was Shine by Pentagon. There were others that occurred before then that I was aware of and watched later on, but that was the first one that was for a group I stanned at the time that I had to get up and watch at 2 am (6 pm Korean time when most comebacks premiere)
The first one I witnessed was either Fake Love by BTS but the first one while I was into kpop was Miroh. First one by a group I stanned before the comeback was Boy With Luv I think. I don’t really remember.
First one (that I knew it was kpop) was probably EXO's 'Monster'/CL's 'Lifted', but first comeback I was really into (voting and stuff) was probably 'Really Bad Boy' by Red Velvet Omg, 2 years of me not knowing what to do when comeback happens
Full on witnessing as in being hyped for it and waiting for it to come out was Monsta X's Fatal Love (and by extension Love Killa), to this day still one of my favourite albums ever :]