The rating reflects my personal feelings, not objective story quality because I skip everything to do with the second leads story (I get what they're going for as a contrast to the main leads but the premise completely falls flat with me).

That being said, I love the story of Doom himself as he initially struggles to admit his own emotionality to himself (it is a painful vulnerability given what his fate and responsibilities in the universe are), and how the story of her learning to understand him reveals so much about the reason he is the way he is. In a way, she teaches him to love himself and come to terms with his own place in the order of things. There's a lot of "pain is the breaking of the shell of your understanding" going on here. Every time I watch it, I get something new out of it. At first, I just thought it was just a tragic romance, but the story is about them developing as individuals. And, I'm not personally religious, but I enjoyed the way they personified God and the philosophy of God as a gardener, who is ever so subtly pulling the strings to try and get the right outcome.

There are a lot of moments where tiny changes in the environment, aesthetics, or actions by a character add to the depth and meaning of a moment without explicitly spelling it out. This gives it a great rewatch quality.

That being said, it is inconsistent quality-wise. It does go downhill slightly after episode 7 or so. There's a lot I could do without, and a lot I could do with more of. But I love it all the same.