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.
And all of us feel regret,
knowing that Kakeru could've been saved.
وكلنا نشعر بالندم، لمعرفتنا أنّه كان يمكن
أن يتم إنقاذ كاكيرو
Wir empfinden Reue,
weil eine Rettung möglich gewesen wäre.
Nos arrepentimos porque pudimos haberlo salvado.
Nos arrepentimos porque pudimos haberlo salvado.
Nous avons des remords, 
car nous aurions pu le sauver.
Il nostro più grande rimpianto
è che avremmo potuto salvarlo.
Ficamos muito arrependidos, porque
 poderíamos ter salvado o Kakeru.
И все мы чувствуем вину, ведь знаем,
что могли бы спасти его.