If you want to unlock all achievements and short paths of the game as well as make your own wallpapers with the images, it's a perfect choice. In other words, you'll buy:

• A pdf with detailed information on how to defeat opponents more easily, short paths to follow, adult scenes localization, and much more;
  
• 7 adult scenes in HD resolution from the current version (or 34 frames of lewd content);
  
• 6 adult scenes in HD resolution and without background from the old version (or 17 frames of lewd content);
  
• 11 concepts (clothed and semi-clothed) from the old version;

To access it, you need to go to:

Location:
C:\Program Files (x86)\Steam\steamapps\common\Yuki's Tale\Beginner Pack

The current guide is Yuki's Tale - Guide.