In a Fortissimo context, this is absurdist art. It is the musical equivalent of a death metal band playing while wearing pink cat ear headbands. The contrast is the point. The narrative likely involves a serious, dramatic plot (Rondo, Fortissimo, Dawn) punctuated by moments of ridiculous, squishy fan-service ( PunyuPuri ).
Producers like PinocchioP, Kikuo, or Mitchie M often combine cute lyrics with dramatic orchestral drops. The “Duo” could refer to Hatsune Miku and Kagamine Rin. Rondo Duo -Fortissimo at Dawn- PunyuPuri ff -Ti...