Born into a family of musicians, Procella member Rui Minazuki and his older brother Rei were taught piano beginning at a young age.
Rui was quickly praised as a prodigy, but Rei was devastated by his brother's talent and abandoned the path of music.
Because of that, the two were alienated from one another for a long time, but currently the bad blood between them has been resolved, and they're back to getting along as brothers.

One day, Rui is asked to perform a piano recital as part of promoting the Full Moon Festival.
Together the members of Procella brainstorm ideas for the recital, and they go to visit Kai on the job in order to get his opinion as well.
By coincidence, this outing takes them to the university hospital where Rei works...
I hear you're performing at 
the Full Moon Festival again.
سمعتُ أنّك ستؤدّي في مهرجانِ البدر ثانية
Bist du dieses Jahr auch wieder
beim Full Moon Festival?
Dicen que actuarás de nuevo
en el Full Moon Festival.
Dicen que actuarás de nuevo
en el Full Moon Festival.
Tu prends part au festival
cette année aussi.
Ho sentito che ti esibirai ancora 
al Full Moon Festival.
Soube que você vai se apresentar
no festival lunar de novo.
Слышал, ты снова выступил
на фестивале Полнолуния.