ALSO,
to be considered as mixxpop like nmixx's, doesn't the song usually needs to have a completely different key change?
I didn't have a keen sense to recognizing a precise key, but I think kitsch didn't had a key change? (or too much different)
you're exactly right, there isn't a key change in Kitsch. Even After Like has a key change but it's not jarring, and Eleven has those little tempo changes here and there
Kitsch feels like mixxpop only cause they stay on a minor chord (within the same key) and drop all the melody for the chorus. Still very effective tbqh, just divisive
