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-
Yeah. So in that song, did you 
hear anything sounding like
نعم. إذاً هل سمعتم بعض العبارات
التي تتخلّل تلك الأغنية؟
Ja, habt ihr mittendrin nicht was gehört,
was wie Worte klang?
Sí.
Sí.
Ouais…
Già. In quella canzone
 non avete sentito
É. Vocês ouviram algo como
Ага. Скажите, а вам не слышалось,
будто кто-то что-то говорит между строк?