The letter from the future details the regret felt by everyone for being unable to celebrate Kakeru's birthday. As such, high school Naho and the gang pester Kakeru about what he wants until the big day. On the other hand, 26 year-old Naho and the gang gather at the late Kakeru's grandmother's house to celebrate his birthday, like they had promised in the past.
But the world of the letters and 
our world are a little different.
.ولكن عالم الرسالة وعالمنا مختلفان قليلًا
Aber die Welt in den Briefen
und unsere Welt
Pero ahora el mundo de la carta
y el nuestro son un poco distintos.
Pero ahora el mundo de la carta
y el nuestro son un poco distintos.
Mais notre monde 
et celui de la lettre
Ma il mondo della lettera e il nostro
 stanno cambiando a poco a poco.
Apesar disso, o nosso mundo está se tornando
 cada vez mais diferente do mundo da carta.
Но мир, откуда пришли письма,
и наш мир немного отличаются.