I'm just curious, are you from Japan? If you are, then it's no problem. If you aren't then you should have put it somewhere closer or even in your own home country.

Art is pretty good, but the heads seems like they are squashed (third panel page 4 and 2nd panel page 5). Also, is the first image in the manga a stock picture? I'm wondering because the quality of the Bg dropped from being really good to flat office buildings with few details.

The accent thing should be mostly used in Kei's dialouge , rather than thinking boxes or you should make it clear that Kei has a strong accent before cutting to the thinking boxes.

Most of the things im pointing out are too late to change unless you want to go through the trouble of changing everything. Other than that it's an interesting manga