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.
It's okay. Don't worry about it.
.لا بأس. لا تقلقي
Ce n’est rien.
Va tutto bene, non preoccuparti.
Não tem problema.
 Não se preocupe.
Ничего. Не волнуйся.