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-
What I longed for was a peaceful 
world where I could live
تلّهفت لعالم هادئ حيث أستطيع أن أعيش
Ich sehnte mich nach einer
friedlichen Welt, in der ich
Lo que deseaba era un mundo
de paz donde pudiera vivir
Lo que deseaba era un mundo
de paz donde pudiera vivir
Ce que je souhaitais,
Volevo solo un mondo pacifico,
O que eu queria era um mundo pacífico,
Я желал лишь спокойного мира, 
где бы я смог жить