This is a Japanese commercial for Calbee ear-shaped chips. I have no idea what the hell's happening, but it appears to be a love triangle between a boy, girl, and anthropomorphic circus dog. Which, now that I think about it, makes perfect sense for a Japanese chip commercial. All it's missing is a guy in a diaper playing with dolls.
Thanks to Carol, who agrees it would have been a lot less weird with a cat.