how to make sense of 御用の方は屋上にまで?


At the beginning of Love Live! Sunshine!! Ep.13, there is a notice written by
the character Hanamaru, that writes: 御用の方は屋上にまで.

[The screenshot](https://i.stack.imgur.com/tYvx2.jpg)

The English substitle says "If you need us, we'll be on the roof". I get the
meaning, but I still can't wrap my head around two things:

  1. 御用の方 means customer or guest. Shouldn't "we" be subject in this sentence?

  2. 屋上にまで, what does にまで here mean? Doesn't まで mean "until, up to"? I have gone through some old questions in this site but I still can't translate this word here convincingly.




> 御用の方は屋上 **に** まで。  
>  "If you need us, we'll be on the roof".

It should be a typo of [御用]{ごよう}の[方]{かた}は[屋上]{おくじょう}まで.

「御用の方は～～まで」 is a common phrase to say "If you need us, please come to ~~" →
"If you need us, we'll be in ~~". 「いらしてください。」 or 「来てください。」("Please come to
~~.") is left out at the end.

**Update:** In the screenshot it's spelled as 御用の方は屋上にまでずら, so maybe they
wrote it that way on purpose. I guess they are making the character speak (or
write) in a bit strange/awkward way, to make them look more
distinctive/unique. (This might be related to
[キャラ語尾](https://ja.wikipedia.org/wiki/%E8%AA%9E%E5%B0%BE#%E3%82%AD%E3%83%A3%E3%83%A9%E8%AA%9E%E5%B0%BE).)




> 御用の方は屋上 **に** まで。  
>  "If you need us, we'll be on the roof".

It should be a typo of [御用]{ごよう}の[方]{かた}は[屋上]{おくじょう}まで.

「御用の方は～～まで」 is a common phrase to say "If you need us, please come to ~~" →
"If you need us, we'll be in ~~". 「いらしてください。」 or 「来てください。」("Please come to
~~.") is left out at the end.

**Update:** In the screenshot it's spelled as 御用の方は屋上にまでずら, so maybe they
wrote it that way on purpose. I guess they are making the character speak (or
write) in a bit strange/awkward way, to make them look more
distinctive/unique. (This might be related to
[キャラ語尾](https://ja.wikipedia.org/wiki/%E8%AA%9E%E5%B0%BE#%E3%82%AD%E3%83%A3%E3%83%A9%E8%AA%9E%E5%B0%BE).)

