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.
can smile together ten years from now.
.يبتسما معًا بعد عشرة سنين من الآن
insieme a tutti noi, anche 10 anni dopo.
a sorrir juntos,
 mesmo depois de dez anos.
они вместе улыбались.