They've upgraded their entire singing style for this song. It's much more mature and forceful than what we're accustomed to from them. Reminds me of the confident kickass Aichan at the height of Platninum era.
That plus the clip is way too brief. I want it to go on for another three minutes.
This song is so next level. One of the best C-ute songs of all time. One of those songs that make you question everything you previously declared as good because now everything else just seems kinda good because its not as good as this song.