Story: Shiro no Keiyaku is a sweet one shot reminiscent of the Little Mermaid. As far as endings go, it was quite lackluster though I did like the convenient twist at the end. I guess the ending really stuck with my like for romanticism. You never make a contract with the devil due to the outcome always being in the devil's favor unless you can find loopholes. But, maybe love is a loophole enough? Characters: Since, this is a oneshot it's more story-driven than character driven. The devil plays both the bad and (the arguably) good guy, here. If I had to have a favorite it would behim.

Shiro is pretty cute. He instantly became infatuated with a human girl, that had shown him kindness when he was in the form of a bird. I liked how he was not clueless. Once he understood how humans were perceiving him, he began to use it to his advantage. He had a clever mind that one.

I liked the Old Man Crow. He definitely tried to look out for Shiro.

The girl was okay. Kinako really did have a big heart for animals and people alike. Her character felt a bit empty, but that's probably due to the length of the story.

Art:
I enjoyed the artwork, especially considering that this is an older title. The crows' human appearances were very cute looking. The outfits were casual and no patterns were used.

Relationship:
Uh, I guess Kinako liked him a lot more than I thought hehe.

Overall:
This is a nice read, but it doesn't have a love confession or kiss scene. Still, for some it's more fun to imagine what happens after the open ending.