Whats the name of this animation?

Its a Japanese animation of a song. It has a pink and blue cats. They get into a air balloon together and then the girl cat leaves him. The cat sings alone again in a box with a vase and flowers. You could touch the flower petals and they'd fall. Its an emotional video. Used to be abled to see it on the same website as the singing horses but don't remember. I'd appreciate the help. Thanks!