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-
The only freedom I'm allowed
الحرية الوحيدة المتاحة لي
La única libertad que se me permite
La única libertad que se me permite
L'unica libertà che mi è concessa
A única liberdade que me foi permitida
Мне дозволена лишь одна свобода —