When Nagomi hears that Chizuru's birthday has already passed, she decides to throw a combined party for both her and Kazuya, and she refuses to take no for an answer!
Why didn't you say so sooner?
لمَ لم تخبريني قبلاً؟
Warum hast du nichts gesagt?
¿Por qué no me habías dicho?
¿Por qué no lo has dicho?
Pourquoi tu l’as pas dit plus tôt ?
Perché non me l'hai detto?
Por que você não disse nada?
Почему ты мне не сказала?