I stumbled upon this word and thought you may think it's the polite form of the word "promise," it's not.
It means, cliche.
I didn't find the word in my dictionary, but i found someone online who did
お約束[oyakusoku] | Japanese words of anime fans, by anime fans, for anime fans
I'm talking about it because in my novel, I acme across "お約束" but it didn't make sense in the context.
My question is, does anyone know how the word "promise" came to become "cliche" when the "O" is added as the prefix?