I keep missing the PV as it gets pulled quickly before I have the chance to look at it!
I was able to listen to the music preview.
It's too hip-hop for me as I really do Not like hip-hop/rap but... to each their own.
I may just get the CDs just for the photo card or B-side song as "Beginner" doesn't interest me at all!
If the video clip is too... violent as many have posted earlier in their comments, it may just push away many fans. Then again, it may add some fans

Maybe management wanted to shake things up a bit or try something new.
There's probably going to be lots of reviews and comments once the Single is officially released.