Both of Cafe 0 games are in sale!
http://store.steampowered.com/app/461810/CAFE_0_The_Sleeping_Beast/
http://store.steampowered.com/app/335660/CAFE_0_The_Drowned_Mermaid/
And this bundle will give you more discount if you want to complete your cafe 0 collection!
http://store.steampowered.com/bundle/2029/CAFE_0_Complete_Bundle/
Enjoy!