The letter from the future details the regret felt by everyone for being unable to celebrate Kakeru's birthday. As such, high school Naho and the gang pester Kakeru about what he wants until the big day. On the other hand, 26 year-old Naho and the gang gather at the late Kakeru's grandmother's house to celebrate his birthday, like they had promised in the past.
Sorry I caused trouble for you two.
.آسفة لأنّي تسببت بالمتاعب لكما
Tut mir leid, dass ihr wegen
mir so einen Stress habt.
Perdón por causarles problemas.
Perdón por causaros problemas.
Excusez-moi, 
je vous cause des ennuis.
Scusate.
Sinto muito.
Простите, что доставляю вам проблемы.