Kurusu has tracked down the identity of the killer, and revealed her secret to Takuru.  Now she goes to the school to meet with the one behind all the murders.
The cause was very difficult 
physical therapy.
كان السبب تلقّيه علاجاً جسمانيّاً صعباً جدّاً
Der Entstehungsfaktor
war eine intensive Rehabilitation.
Se originó por una dura rehabilitación.
Se originó por una dura rehabilitación.
Il prend son origine
dans sa période de rééducation.
e l'elemento scatenante è stata
la durezza della riabilitazione.
A causa foi uma 
fisioterapia problemática.