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'm sure you'll push yourself 
too hard even if I tell you not to,
أنا متأكّدٌ أنّك ستضغط على نفسِك كثيراً
،حتّى لو قلتُ لك خلاف ذلك
Egal was wir sagen,
du übernimmst dich eh.
Sé que te forzarás aunque te digamos
que no lo hagas, pero cuídate.
Sé que seguirás así aunque te digamos
que no lo hagas, pero cuídate.
On te dit ça comme ça,
mais essaie de prendre soin de toi.
Sono certo che ti sforzeresti troppo
anche se ti dicessi di non farlo,
Sei que você vai se esforçar mesmo
que eu diga para você não fazer isso,
Сколько ни говори, ты так и так
будешь работать до упаду.