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 northern pike will rush 
forward to eat the small fish
ستندفع سمكة الكراكي الشمالية 
لتأكل الأسماك الصغيرة
Der Europäische Hecht wird vorwärts rasen,
um diese zu fressen,
El lucio se abalanzará
para comerse a los pececitos
El lucio se abalanzará
para comerse a los pececitos
le brochet va se jeter sur eux
pour les manger,
Il luccio scatterà in avanti 
per mangiarsi i pesciolini,
O Lúcio iria correr para
comer os peixes menores e
Щука будет нестись вперёд, 
чтобы съесть рыбок,