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.
Why don't you join the soccer club?
لمَ لا تدخل نادي كرة القدم بشكلٍ كامل؟
Warum gehst du nicht
fest in den Fußballklub?
¿Por qué no te unes al Club de Fútbol?
¿Por qué no te unes al club de fútbol?
Pourquoi tu n’intègres pas 
l’équipe de foot ?
Perché non entri nel club di calcio?
Por que você não entra 
para o clube de futebol?
Почему не вступил в футбольную секцию?