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.
that made Kakeru close his heart to me...
...الذي جعل كاكيرو يغلق قلبه عنّي...
und Kakeru sein
Herz verschloss,
Kakeru se replie sur lui-même…
che Kakeru si è allontanato da me,
de o Kakeru ter se 
fechado para nós...
Какэру закрыл от меня своё сердце...