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.
so some believe they can 
be used to time travel.
.لذا يعتقد البعض أنّ بالإمكان استخدامها للسفر عبر الزمن
Es existiert die These,
dass damit ein Zeitsprung möglich ist.
que permitiría dar un salto temporal.
que permitiría dar un salto temporal.
Et pour certains, 
ce serait une faille temporelle.
Ci sono teorie per cui si ritiene possibile
utilizzarlo per questo scopo.
E por isso, dizem que é possível
 viajar no tempo por meio deles.
и с её помощью можно
было бы перенестись во времени.