you know that i'll never leave your side

One Direction members as cats and dogs... who are lovers
by rocketshiptospace

Excerpt:
"years go on, and louis grows out to be a proper cat (still hyperactive and annoying, and he's also adorable and likely to get away with everything) and nick becomes an actual dog (harry claims he looks a bit like a grumpy hipster. liam definitely agrees with him.)

This one isn't so much disturbing as it is perplexing. Humans Harry and Liam buy a cat named Louis and a dog named Nick. Cat Louis and Dog Nick fall in love (although we're spared any details of interspecies copulation) and that, in turn, inspires the humans to fall in love. Then the animals die and we all get our hearts broken and learn lessons about love and life. It's a "Marley and Me" for people who really wish that 40 percent of One Direction were domestic animals.