Setsuna rises up to create a future for a city without hope, but tragedy strikes time and again. Meanwhile, Rinne finishes her invention and Setsuna sets out for the future to save mankind’s existence.  Just before he goes, Setsuna makes a promise to Rinne.
If left untreated, it can be fatal.
إن تُركت بلا علاج، يمكن أن تكون قاتلة
Unbehandelt ist es lebensbedrohlich.
Sin tratamiento, es fatal.
Sin tratamiento, es fatal.
Elle y passera si on fait rien.
Se non viene curata, può essere fatale.
Se não for tratada, pode ser fatal.
Если запустить —
можно умереть.