If you loved Angel Sanctuary, try Air: The Motion Picture
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Animation / Fantasy / Romance territory. If that's the register that drew you to Angel Sanctuary, the second film will land in a comparable space — through a different lens.
What Air: The Motion Picture is
Apparently someone needed a tragic love story with wings. A young girl in a coastal town relives a centuries old curse. It predictably gets emotional.

