Joou Sama is going to play her special rainbow piano live at the Melody Land festival. However, the piano no longer glows and so Papapianitchi tries to fix it. He discovers that the rainbow inside the piano has died out and he asks Pianitchi to capture a new one. Pianitchi and the others are unsure how to obtain a rainbow, so Yumemitchi and Kiraritchi transform into firefighters and form a rainbow using a hose.