So did you know Canaan is actually a side-story of a PS3/Wii/PSP game called 428: Fūsa Sareta Shibuya de?
Visual novel style originally for the Wii.
From its Wiki page:The game also features a special scenario contributed by Kinoko Nasu and Takashi Takeuchi of Type-Moon fame, who wrote and provided character designs for them respectively. It was subsequently announced by Sega that this particular scenario by Type-Moon would be adapted into a TV anime adaptation titled Canaan.
This game scared a perfect 40/40 in Famitsu, that makes it the 9th game ever to get a perfect score.
Lets home it gets an English release some time. :3