I apologize in advance for the lack of details. This is an anime movie which I've watched a long time ago on TV, and I've only seen the ending. I remember a scene in which there was a man and woman talking, and one of them betrayed the other and shot them.
The animation style resembles something from the Lensman era, so I'm thinking '80s or early '90s. I distinctively remember it due to the fact that it was one of the first animations, if not movies in general, that had important non-villain characters dying.
Anyway, the one detail I distinctively remember is that every time a person died, it was depicted as a white bird flying away, as if the person's soul was going to heaven.
At the end, there was a guy lying down, leaning on a rock, apparently dying, possibly regretting something he had done, or a choice he made. He was looking at the sky, and then you see a white bird flying away, implying he had died. The bird then joined a whole bunch of other white birds, implying something about his choice having caused a lot of people to die, or something to that extent. It was all very symbolic, but I was young, and started watching it near the end, so I could only just barely follow.
I also think it was possibly sci-fi, but not 100% sure.
Anyway, while I realize it's a long-shot, I would like to know if anyone has a clue what movie it was, so maybe I can watch it again from the start, and actually get it this time.