Honestly, I don't know why this isn't rated higher. This was such a great series. Really, there's no downside to this except that I wish it were longer. If they had a little more time to work with, they could have explained a bit more on the "deal" Choco and Milk got in order to come back as humans. That part is still a little foggy to me except that they had to risk their lives to do it.
And if they continue to do so, do they get to keep coming back for stretches of time?

But regardless, I thought the concept was pretty unique and well executed, especially in the personalities of Choco and Milk.
You can really tell one has the excited nature of a dog while the other is the overlord cat. I enjoyed the little nuances like how Milk shies away from Uncle when he sits down and only tentatively eats the whipped cream until Uncle leaves the table. I was waiting for Milk to bat at a glass on a table and was so ridiculously happy when he finally did. The actors did such a great job and had me grinning and laughing the whole way through.

Except for those serious moments that really pulled at the heart and caused a few tears to fall. The story really had lot of heart and especially episode 3 broke me.. and surely will anyone who has ever lost a pet. Absolutely heartbreaking in a beautiful way.

I would watch this again and again, just to see the acting from Choco and Milk. Definitely recommend!