Kakeru enters the soccer club as a provisional member, just as the letter says. When the topic of lunches comes up after practice, Kakeru jokingly asks Naho to make lunch for him as well. Naho finds herself bewildered by his words, but feels pushed to act by the letter from herself 10 years in the future, which tells Naho that she wishes she had made lunch for Kakeru.
The letter said not to invite Kakeru 
on the day of the opening ceremony.
.قالت الرسالة ألّا ندعو كاكيرو في يوم حفل الافتتاح
Am Tag der Beerdigung …
En la carta decía que no invitáramos
a Kakeru el día de la ceremonia de inicio.
En la carta decía que no invitáramos
a Kakeru el día de la ceremonia de ingreso.
Le jour de la rentrée…
Sulla lettera... c'era scritto di non invitarlo
il giorno della cerimonia di apertura.
No dia da cerimônia, a carta dizia
 para eu não convidar o Kakeru.
В письме говорилось не звать
его гулять в день церемонии.