Here you can watch Dog Star 123Movies
A seeing-eye dog (Shiro) is granted one wish by his former owner. He chooses to become a human for a short time so he can find the girl who trained him as a puppy. While attempting to get to know her (as he runs along behind her and sniffs for her around town) he eventually falls in love with her.
Director: Takahisa Zeze
Actors: Etsushi Toyokawa, Haruka Igawa, Hideo Sako, Kanako Fukaura, Kenjiro Tsuda, Kimiko Yo, Ryo Ishibashi, Shigeru Izumiya, Yôko Kamon, Yuuki Ogoe