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...
♫ These flowers blossom but once a year ♫ 
♫ تتفتّح هذه الأزهار مرّة في السّنة ♫ 
Sus botones solo florecen una vez al año
Sus botones solo florecen
una vez al año
A apenas uma vez por ano suas flores desabrocham
Лишь раз в году
цветы их распускаются.