Naho got into a fight with Kakeru on New Year's Eve, and never managed to apologize to him before he passed away. At least, that's what the letter from the future says. However, Naho now believes that she's capable of dealing with whatever may come up, and faces New Year's Eve head-on.
nothing will change in the world 
the letters came from.
.لا شيء سيتغيّر في العالم الذي أرسلوا الرسائل منه...
ändert sich nichts in der Zukunft,
aus der die Briefe kamen.
en aquel mundo no cambiará nada.
en aquel mundo no cambiará nada.
le monde de la lettre 
ne sera pas affecté.
nel mondo da cui proviene la lettera
non cambierà nulla.
O mundo em que os remetentes das 
cartas vivem não sofrerá alterações.
в мире, откуда письма,
ничего не изменится.