The protagonists hear that they'll be shooting a PV, but it turns out to be a promotional video for Nagarekawa tourism rather than a music video for themselves.
We could finish it 
not just because of me,
Wir konnten es nicht nur
dank mir fertigstellen,
No lo terminé solo,
No lo terminé solo,
Ce n’est pas seulement
grâce à moi,
Não conseguimos terminar 
só por minha causa,