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 wondered why I hadn't done a better job
تساءلت لمَ لم أرعى هؤلاء الاثنان
habe ich mich gefragt,
warum ich nicht auf beide
me arrepentí de no haberlos apoyado.
me arrepentí mucho de no haberlos apoyado.
je m’en suis voulu 
de n’avoir rien fait pour eux.
mi chiesi perché non fossi stato
Depois que o Kakeru se foi e eu vi a Naho 
chorando, se afogando em tristeza.
Fiquei me questionando o porquê 
não fui capaz de torcer pelos dois.
я терзал себя вопросом,