It's a movie and this is what it's writting behind my DVD case. It'll be better then if I start talking about it.
During summer vacation, a schoolgirl named Shizuku, who longs to discover her true talents, observes an ordinary-looking cat riding by himself on the train. Intrigued, she decides to follow him. This chance encounter leads her to the mysterious Seiji, a boy who is determined to follow his dreams, and The Baron, a magical cat figurine who helps her listen to the whipers in her heart. Soon, Shizuku's exciting adventures carry her far beyond the boundaries of her imagination.
Though, it's not an aventure movie, everytime I watch it, I'm always drawn by the characters, the story, and the famous song, that I guessed is the theme song which is Country roads. Only in the movie, Shizuku plays a bit with the lyrics.
This is one I recommand.