@johnny_average
Doubt it if it's the average non-Christian Japanese household. Probably saying something like "Mataku" which is like verbalizing sighing in exasperation.
People hating on Nasa because he lost his memory from getting hit by a truck? Who do they think he is? Ayasaki Hayate?
And I can't hate on Tsukasa yet. We're just guessing she left from the shock he had forgotten the moment. There might be more to her leaving. I'm taking a wait and see approach.