As Hibiki is spending more and more time fighting the Noise, it means less time for her studies and less time for her friends.  Miku is feeling alone and isolated, but she makes a promise with Hibiki to go get some snacks after school.  But when school ends, Hibiki gets another call...
Sorry... Something just came up.
آسفة، حدثَ أمرٌ مفاجئ
Tut mir leid,
mir kam gerade was dazwischen.
Lo siento. Algo surgió.
Lo siento. Me ha surgido algo.
Pardon.
Scusami, c'è stato un imprevisto...
Desculpa, acabei de 
marcar um compromisso.