With his home prefecture's Nebuta festival approaching, Kogami Taiga becomes increasingly excited. By strange coincidence, Edel Rose is hired to do some work at the festival. The group is invited to Taiga's home, where his sister Ozora tells them about the first time Taiga came to Tokyo and his first encounter with Prism Shows.
This is why we said we'd make them ourselves.
لهذا قلنا أننا سنصنعها بأنفسنا
Wir wollten sie ja selbst bauen.
Por eso debimos hacerlo nosotros.
Por eso debimos hacerlo nosotros.
E infatti fino ad ora li abbiamo fatti da soli!
Por isso que falei pra 
nós mesmos fazermos elas.
Потому мы и хотели её сами сделать.