Story from Kanon and Air, with original character design from Da Capo
The staff alone is enough hype to make most people want to watch the show, and fortunately it's more than just hype -- the plot and story are definitely more interesting and less predictable than most average series, the visuals were well done, and the action scenes parallels R.O.D in many ways. Definitely worth watching again and again.
Feels like a game converted to anime, but actually the anime is the original. Maybe a game will be made from the anime now.
+ Sola / Google