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-
but it was as though all of sudden, 
they had ran out of machine oil.
لكن كان وكأن زيت المكنات قد 
نفد منها بصورة مفاجئة
aber es war, als hätten sie
plötzlich kein Maschinenöl mehr.
pero de repente se quedaron sin aceite.
pero de repente se quedaron sin aceite.
mais c’était comme si d’un coup,
ils avaient manqué d’huile.
e invece è come se di punto in bianco
 non fossero più oliati.
é como se, de repente, o óleo
da máquina tivesse secado.
но у них будто внезапно 
закончилась смазка.