I seriously need help, I downloaded everything in the link and when I extracted the files it's all good but when I double click Grisaia_ver101 weird pop up I-don't-know-what it means pop ups, the "Read me" file is useless, I need help ASAP ;w;
Try changing your locale to Japanese.
To change locale on Windows 7:
1 - Click the "Start" Button.
2 - Click "Control Panel".
3 - Click "Clock, Language, and Region".
4 - Click "Regional and Language Options".
5 - Click the "Administrative Tab".
6 - Click "Change system locale" under "Language for non-Unicode programs (System Locale)
7 - Change actual regional parameters to "Japanese (Japan)" then Restart now.
For Windows 8 and later, you can try googling it.
If that doesn't work... hopefully someone else can help you, or alternatively, wait for the official 18+ version of the game to come out and buy it or buy the all-ages one, or pirate them as I imagine people will upload them, those are likely to work on your regular locale (or at least English-based ones).
Also, next time post in the Grisaia thread directly, please. Good luck!
Edit: Looking again at the pictures, I just have to ask, because I've seen a lot of people do that mistake in the past... Did you actually install the game? By mounting it through Daemon Tools (http://www.disk-tools.com/download/daemon) or something similar? You didn't just unpack the ISO? Don't worry if so, you wouldn't be the first.