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 I hear a voice I've never 
heard before talking to me,
أو عندما أسمع صوتاً لم يسبق
،أن سمعته يخاطبني
oder wenn plötzlich eine Stimme
mich anspricht, die ich nicht kenne,
o cuando escucho una voz
que nunca antes había escuchado
o cuando escucho una voz
que nunca antes había escuchado
o quando sento una voce 
che non mi ha mai parlato prima,
ou uma voz que nunca ouviu,
começa a falar com você,
или если я слышу, что со мной 
говорит незнакомый голос,