Shikishima Ritsu was living a fulfilling high school life.
Then one day, when Ritsu heard the new song from popular idol, μ, he noticed a cry for help hidding within the song.
Ritsu tried to confirm it with his friends, but none of them would respond to his questions, and they even acted off.
The suspicious incongruities continued piling up until the new year's entrance ceremonies. Yet the new students entering the school were-
If I were to close my eyes and look 
back on these past three years,
إذا أغمضت عيني ورجعت بالذاكرة
إلى السنوات الثلاث الماضية
Würde ich meine Augen schließen
und an diese drei Jahre denken,
Si cerrara los ojos
y echara la vista atrás tres años,
Si cerrara los ojos
y echara la vista atrás tres años,
Quand je ferme les yeux
et que je pense au lycée,
Se dovessi chiudere gli occhi
 e ripensare agli ultimi tre anni,
Se eu fechar os olhos e olhar para
estes três anos que se passaram,
Если закрыть глаза и вспомнить
прошедшие три года,