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.
Please make it so the two of them
احرص على أن
Sodass beide
Para que puedan seguir sonriendo
juntos diez años más tarde.
Para que puedan seguir sonriendo
juntos diez años más tarde.
Je t’en prie, fais-le.
Ti prego, fa' in modo 
che loro due possano sorridere
Por favor, certifique-se de 
que eles possam continuar
И проследи, чтобы даже спустя десять лет