Apart from “Be Mine” and “Destiny“, I hadn’t really liked any of Infinite’s songs. That changed when they changed up their sound with “Bad”. I’m usually easily caught by backtracks and instrumentals that include strings/orchestral elements in them, which “Bad” uses very much to Infinite’s advantage.
On top of that, their mainly high range vocals and lower range rappers were used in the quieter sections of the instrumental, whilst the more pop-friendly hook and chorus vocals were kept sparse and repetitive as the instrumental got busier. It really helped to keep the full, epic sound built up in the intro.
The video also matched the lyrics and atmosphere of the song well, and made use of 360VR, albeit in a slightly lazy way.
I’ll leave the music theory gushing to MRJ if you’re interested. Please Infinite, give me more of these kinds of songs.