Itsuka Tenma no Kuro Usagi seems to struggle with the above. It's difficult to make out what this anime wants to be. "Comedy" is the first genre listed, but the anime's attempts at comedy are out of place in the darkish setting. As far as romance, there's a lot of it, but it's kind of monotonous. Scenes and characters seem to pop up out of nowhere with little explanation. There isn't much consistency throughout the series, other than everything being really pretty. "Shiny darkness" probably best describes it.
There's not much of any character development at all, despite the definite potential. Most of the relationships were formed before the series starts. Characters just seem to appear and there's very little background to them. This makes it difficult to feel any attachment to the characters.
The comedy is awkward and sometimes feels thrown in. I didn't really feel comfortable laughing at anything. There's an entire episode that comes out of nowhere that's dedicated to the comedic aspect of the show, when the episodes around it show no indication of comedy. This and a few other episodes seem to break the continuity of the show.
As for the romance aspect, it's pretty cut and dried. As the story has little character development, the romantic development never gets very far either. The main characters are "madly in love" to start the series. Not much changes with that. It finishes on the same gear it starts on.
The story is pretty intriguing, even if it's been done before. There are a few plot twists that might not be predictable.
I did feel like the music and art compliment each other pretty well. There is a certain "shiny darkness" to the art that sets the mood. The music mostly consists of string orchestra that captures this shiny darkness.
Overall, Itsuka Tenma no Kuro Usagi has a decent story but doesn't have much coherence. The aesthetics on their own are nice to look at, but they're wasted on characters that don't match the depth of the art. And the most important factor: Was it enjoyable? I felt like watching it was a chore, and that's never a good thing.
