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-
Soon it will be a year since I started 
here at Kishimai High School.
قريباً سيكون قد مضى عام منذ بدأت
هنا في ثانوية كيشيماي
Bald ist es ein Jahr her, seit ich
an die Kishima-Oberschule kam.
Pronto hará un año
Pronto hará un año
Ça va bientôt faire un an
Ho quasi finito il primo anno qui, 
alla Scuola Superiore Kishimai.
Logo fará um ano que
entrei no Colégio Kishima.
Скоро исполнится год с момента начала 
моей учёбы в старшей школе Кисимаи.