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...
Since I'm older than you,
I started playing before you.
...أنا أكبر منك وبدأتُ العزف قبلك
Weil ich älter bin, habe ich
zuerst mit dem Klavier angefangen.
Como soy mayor,
empecé a tocar antes que tú.
Como soy mayor,
empecé a tocar antes que tú.
C’est moi l’aîné,
j’ai débuté avant toi.
Visto che sono più vecchio di te,
ho cominciato prima io a suonare.
Como sou mais velho,
comecei a tocar antes que você.
Я старше тебя и играть
начал раньше, чем ты...