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'll do something.
.أنا سأفعل شيئًا ما
Ich kümmere mich irgendwie darum.
Mach dir also keine Sorgen.
Yo me encargo. Tranquila.
Yo me encargo. Tranquila.
Je vais m’en occuper. 
Ne t’inquiète pas.
Penserò io a qualcosa.
Eu vou dar um jeito nisso.
Я что-нибудь придумаю.