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-
or when everyone around me suddenly starts 
acting differently than I've known them to...
أو عندما يبدأ الجميع من حولي فجأة بالتصرف
...بشكل مختلف عما عرفته من قبل
o cuando los de mi alrededor
empiezan a actuar de forma diferente,
o cuando los de mi alrededor
empiezan a actuar de forma diferente…
ou qu’autour de moi,
o quando tutti quelli che mi circondano iniziano
 a comportarsi in maniera diversa dal solito...
ou quando as pessoas ao seu redor
começam a agir de forma diferente...
или если все вокруг внезапно начинают
действовать не так, как обычно...