Dogimagi!

From Aerandria Scans:
One day, while Yamato is daydreaming and looking at the clouds, a girl comes flying down from the sky! It turns out that she’s looking for her pet, Sanpei, and being the gallant guy that he is, Yamato decides to help this cute but somewhat queer girl. The only thing bothering him is, what kind of pet is Sanpei?