So two people in as many days have never heard of There She Is! and this must be remedied.
There She Is! is a cute, deceptively deep series of five animations, each about three to five minutes long. It revolves around Nabi, a male cat, and Doki, a female bunny and their whirlwind romance and the prejudices, fuzzy bunny gangs, and animal stampedes that get in the way. It has a killer, amazing case of Mood Whiplash in Part 4: Paradise, and I think it works very well.
I really, really love this series and hugely recommend taking the 20 to 25 minutes it takes to watch them. TVT has a page linking to all of them
here. Give it a shot. ♥ For something that's all about Cute Animals and K-Rock Earworms, it's inspired.
-Lucy
ETA: The Ctrl key just popped off my keyboard. I put it back in. Weird, though.