Koyama Sachi, a high school girl living in Iwaki City, Fukushima, has been deeply scarred by the Tohoku earthquake of 2011. Since it occurred, she's distanced herself from her friends and family, and shows no interest in people or romance. A violinist since childhood, she's a member of her school's music club and practices every day to prepare for the quartet performance at the school cultural festival. In the midst of all this, she meets Yuusuke, a boy who took refuge in Iwaki after his family was left unable to return home following the great quake, and the two begin to fall in love...
Apparently the sun's green light 
is a symbol of good fortune.
يبدو أن ضوء الشمس الأخضر هو رمز للحظّ السعيد
Dicen que la luz verde del sol
augura una buena fortuna.
Dicen que la luz verde del sol
augura buena fortuna.
Il paraît
que ces rayons verts portent chance.
A quanto pare, i raggi verdi del sole 
simboleggiano la buona sorte.
Parece que a luz verde do sol
é um símbolo de boa sorte.
Зелёный свет солнца
считается символом удачи.