Setsu's unconventional mother, Sawamura Umeko, has suddenly descended and forced him to enroll at Umezono Academy. In helping to assemble a shamisen which has lain long disused, he meets Maeda Shuri, a girl in the same grade as him. While all this is going on, Setsu reunites with his older brother, who he hasn't seen in a while, and they play shamisen together...
Because, little brother, you are
too half-assed about everything!
!لأنّك لا تبالي بأيّ شيء يا أخي الصّغير
Weil du einfach nichts ernst nimmst.
Parce que t’en fais qu’à ta tête !
Perché ci sei già tu che sei 
fin troppo irresponsabile, fratello mio!
Porque você, meu irmão
mais novo, não liga pra nada!
Потому что ты, братец,
ко всему безразличен!