Kakeru gives Naho a hairpin. And on the weekend, Kakeru invites Naho to study with him for the upcoming exams. As the pair begin to grow closer together, Naho gets up the courage to invite Kakeru to see the fireworks together with her at the end of the school festival.
If there's nothing you can do to change the past,
...إن كان لا يوجد ما يمكنك فعله لتغيير الماضي
Wenn man die Vergangenheit
eh nicht ändern kann,
Si no se puede cambiar el pasado,
Si no se puede cambiar el pasado,
Je saurais quoi changer 
dans le présent,
Se davvero non c'è modo di cambiare il passato,
Já que não podemos
 mudar o futuro,
Если прошлое никак не изменить,