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-
Oh, uh, in other words, when the voice 
is completely different from my own,
بعبارة أخرى، عندما يختلف الصوت
،كلياً عن صوتي
Wenn also diese Stimme ganz anders ist
als die eigene Stimme
En otras palabras,
cuando es una voz diferente a la mía
En otras palabras,
cuando es una voz diferente a la mía
Ah, euh, pour résumer…
Oh, uh, in altre parole, quando la voce
 è completamente diversa dalla mia,
Ah, bom, em outras palavras, seria
quando uma voz diferente da sua,
А, ну, короче... Если этот голос 
совершенно отличается от моего,