It all began ten years ago. D2s attacking Boston, a blood-soaked concert hall: The incident known as the Boston Tragedy. The conductor who lost his life in that tragedy was none other than Kenji Asahina, Takt's father. After losing his father, the boy decides to devote himself to playing the piano and he lets his rage play through his melodies. The one who took care of him was a girl named Cosette, who looked just like Destiny.
It's been four years since
 the Sagan Declaration.
مضى أربع سنوات منذ إعلان ساغان
Das Sagan-Manifest ist auch bereits
vier Jahre in Kraft.
Tous les habitants ont pris sur eux
pendant les quatre ans de décret,
Sono passati quattro anni
dalla dichiarazione di Sagan.
Já se passaram quatro anos
desde a declaração do Sagan.
С манифеста Загана прошло четыре года…