I am positive Eunjae has never called him "704". If he had, it would have been translated that way, but he never did (probs due to their past, it's a nice touch). And I'm pretty sure he has referred to him as "the reaper" too. It's seems like the author always finds a way
Yup, he is been calling him "Mr. reaper" or just "the reaper" since pretty much the beginning.
I was surprised too, I don't remember him calling 704 ''the reaper'' before this
I mean I could totally remember things wrong! Now that I think about it, there wasn’t a lot of interaction between them to begin with….
Did they perhaps change the translator? Eunjae has never referred to 704 as “the reaper”. I know Koreans tend to call others by job title but the English translation has always used his name when ppl who are close to 704 are talking about him.