Naho can't give her Valentine's Day chocolate to Kakeru. Ever since what happened on New Year's Eve, Kakeru keeps putting distance between Naho and himself. But, through all the hardships, Naho refuses to give up and fully intends to tell Kakeru how she feels. And so, the time comes for everyone to face the fateful day outlined in the letters from the past, "Kakeru's Final Day."
It's not as if we'll be able to 
change our own world's past.
.ليس وكأنّنا سنتمكّن من تغيير ماضي عالمنا
Die Vergangenheit unserer
Welt ändern wir damit nicht.
y nuestro pasado tampoco cambiará.
y nuestro pasado tampoco cambiará.
Nous n’arriverons pas 
à changer notre passé.
Non vorrà dire 
cambiare il passato del nostro mondo.
Nós não conseguiremos mudar o passado
 do mundo em que vivemos agora.
Нельзя сказать, что невозможно
изменить прошлое нашего мира.