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.
A button on your sleeve was also loose, 
so I tightened that, too.
.كان هنالك زرٌ رخو في كمّك لذا شددته أيضًا
Ein Ärmelknopf war auch lose,
weswegen ich den auch angenäht habe.
Cosí otro botón de la manga
que iba a caerse.
Cosí otro botón de la manga
que iba a caerse.
J’ai aussi recousu 
le bouton de ta manche.
Un bottone della manica era parecchio allentato 
e ti ho sistemato anche quello.
Os botões da manga também estavam 
frouxos, então os costurei também.
Пуговица на рукаве еле держалась,
так что я и её подшила.