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.
You don't need to know.
لا داعي لتعرفي
Es ist besser, wenn du nichts davon weißt.
No necesitas saberlo.
No hace falta que lo sepas.
Mieux vaut
que tu ne le saches pas.
Non c'è bisogno che tu lo sappia.
Você não precisa saber.
Тебе лучше не знать.