TTZZ is Hirata going balls to the wall full on Japanese club electro in the chorus, and since I love that genre, I love this, too.
Never thought I'd ever see trap music stylings in a H!P song, either (the verse), and it was pretty damn great, too, with all of those little dissonant flourishes.
Unlike Hirata's previous take on the rap section in Dokusenyoku, he lets the arrangement do the heavy lifting, and so the rapping is kept laid back, not super angry or try-hard. More like the Do It! Now rapping. Rap as just another instrument layer in the rhythms. No accents necessary.
And the MV is a flawless Kpop-Dance-In-A-Box, too. Perfectly matches the song, and enhances the choreography. Makes all of the girls look great.