The MV shows the guys standing around a little girl and ruining her sandcastle she built. This sets the theme for the whole video. The video then shifts to this girl in school, a bit older, and the guys coming into the classroom and causing a disruption.
This goes on throughout her life in various situations in the video. At the end of the video, it shows her as an old women in the house and a little boy outside and the guys starting to gather around him. So this is what I mean by the weird setup.

But otherwise, this song is so awesome and very bright and colorful. It grabs your eyes with the flashing lights, good looks, and dance moves.

The choreography is just amazing and so on point. But it definitely catches your ears with the cool beat and music. I hope you all enjoy this new MV by NCT 127. Please support these guys. With what I have seen, I am sure there are more great songs and MV’s to come.
Park Sa-lim, Seoul