Yukimuro Shunichi

(from ebookjapan):Aiko's beloved dog, Papi, who had been her best friend without her father, was hit by a truck and killed. Aiko, who was devastated, was faced with a funny dog, Spank. And before she knew it, Spank had already taken her place as the dog of choice...The two become good friends, and this lovely story with a refreshing touch is reprinted in its entirety!Won the 5th Kodansha Manga Award for Shojo in 1981