Massugu ni Ikou. (2004)

Mametarou's life is as good as a dog's can get! With his loving owner Iku, precious girlfriend Hanako, and close network of neighborhood friends, adventure is always waiting around the corner. Yet in between his insecurities about his cross-breed status, a lovesick Iku, and rivals for Hanako's affection, Mametarou's world is a little more complicated than he'd like it to be. With various problems to solve along the way, Mametarou tries his best to be a good pet and, even more importantly, a good friend.