it seems like this is your first time reacting to vvup, btw this song is very pleasant to listen to if you listen to it repeatedly, the song prioritizes musical details and sounds unique...
looks like you put the wrong link. on my device it says "viviz" while the one you are reacting to is "vvup"? or is this just my device? the song is quite good and catchy (super fun!) just the mv looks kinda minimalist (?) but yeah it's fun to watch ng.