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.
Here's my present. Don't be surprised.
.هذه هديّتي. لا تتفاجأ
Das hier ist von mir.
Sei bloß nicht überrascht.
Que no te sorprenda mi regalo.
Que no te sorprenda mi regalo.
Voici mon cadeau, 
n’aie pas l’air surpris.
Ecco il mio.
Eu também trouxe um presente.
Мой подарок тебе. Не удивляйся.