So.. it aired a while ago.. it had a nice slow paced feeling to it.
There is still a lot of room for character development, but what can you expect from a first episode. The characters all seem to harmonize with each other (in general, I mean). Each of the characters have something deep inside their hearts they can't really tell anyone else. It's intriguing and charming, calm and exciting. The Christmas feeling already puts you in the mood for holiday. ^_^
Without too much spoiling, the keywords of the wonderful opening. Think of those keywords like those from Last Friends. Here they also have a meaning and somewhat describe the characters.
Kanon - Destiny (Horikita Maki)
Junya - Memory (Kitagawa Yuujin)
Kiyoka - Betrayal (Uchida Yuki)
Subaru - Denial (Narimiya Hiroki)
Yoji - Sacrifice (Fukushi Seiji)
Jiro - Disclosure (Toyohara Kosuke)
Mizuki - Jealousy (Kashii Yuu)