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.
Totally. I've gained weight doing that.
.حقًّا، لقد زاد وزني بسبب فعل ذلك
Versteh ich. Davon
kann man echt fett werden.
Lo sé. Engordé por eso.
Lo sé. Engordé por eso.
Je sais, j’ai déjà pris du poids 
à cause de ça.
Ti capisco. Ne mangerei fino ad esplodere.
Com certeza! Já teve vezes 
em que acabei engordando!
Точно. И я так поправилась.