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.
Why not?
لمَ لا؟
Warum?!
¿Por qué no?
¿Por qué no?
Perché?
Por que não?