One of the best I've seen and my all time favorite even now.
The studio did a great job adapting the original VN and the art and animation is great in general (this is from 2009 and the animation and writhing is better that some adaptations nowadays).
It's hard for me to choose one single girl as my favorite and I love the simple "Daily life" scenario.
The only bad point about it is that it's too short, even the new version of the third chapter just added a few scenes and the studio never even tried to adapt the sequel of the visual novel (one of the best sequels for a VN I've played) which I think is a real waste.