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.
I thought it was about time I advertised it.
.اعتقدت أنّه حان الوقت لأعلن عنه
Ich wollte langsam
mal darauf hinweisen.
Se lo recuerdo desde ya.
Os lo recuerdo desde ya.
Je tenais à attirer votre attention.
Pensavo di fartelo presente, sai com'è.
Achei que já estava na
 hora de lembrá-los.
Я подумал, что пора бы напомнить.