This image is third-party edit that has been detexted and upscaled among other things. Its origin is most likely from the sample image that can be found on this site: https://www.4gamer.net/games/337/G033789/20160610002/SS/010.jpg
They removed the sample watermark and upscaled the image, which is why the details don't seem very sharp for an image that isn't a scan.
If you look for the "S" of "SAMPLE", on the tail of the left girl, you will see the traces of the "S". If you look for the "A" you will see that some lines of the hair are gone or just wrong. If you look for the "P" you will see that part of the cleavage line is gone or extremely faded which shouldn't be the case.

I'm pretty sure I can find a scan of this image so I'll be looking for one to upload before flagging this one.