Naho got into a fight with Kakeru on New Year's Eve, and never managed to apologize to him before he passed away. At least, that's what the letter from the future says. However, Naho now believes that she's capable of dealing with whatever may come up, and faces New Year's Eve head-on.
If this fight was the trigger
...إن كان هذا الشجار هو المسبّب
Wenn das, was heute
passiert ist, der Grund war,
Si Kakeru cerró su corazón
por lo que pasó hoy…
Si Kakeru cerró su corazón
por lo que pasó hoy…
Si à cause de ce qui est arrivé 
aujourd’hui,
Se è stato per quanto è successo oggi,
Se a briga de hoje se tornou o motivo...
Если именно из-за этой ссоры