A second piece of DLC is now available,
This includes a few wallpapers and art as well as the Shizume Misaki Dakimakura high resolution image.
The resolution of the Daki is high enough to work for a real dakimakura pillow printing if you wish.
More details can be found now live on Steam:
http://store.steampowered.com/app/372810/
For release the small pack of artwork is also 25% off.