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.
Your promised you weren't going to 
join any clubs at your new school.
.لقد وعدتني أنّك لن تذهب لأيّ نادٍ في مدرستك الجديدة
Du hast doch versprochen, dass du in
der neuen Schule keinem Klub mehr beitrittst.
Prometiste que en la nueva escuela
no entrarías a ningún club.
Prometiste que en tu nuevo instituto
no entrarías a ningún club.
Tu m’as promis de ne pas t’inscrire 
dans un club.
Mi hai promesso di non iscriverti 
a nessun club, nella scuola nuova, no?
Você me prometeu que não entraria em 
nenhum clube na escola nova, não é mesmo?
Ты же обещал, что в новой
школе не пойдёшь в кружки.