No Matter What (Twenty One Pilots)
After having a fallout with his so called "friends", Josh starts hiding away in his bedroom. His parents, of course, are concerned, but in not wishing to invade his private life, they get him a dog. Tyler ends up helping Josh over come the plague of loneliness and slight depression, and even helps him find a new friend along the way.
Yes, Tyler is a dog. No, this is not a Joshler fic. This is nothing other than an alternative universe story wherein a boy much like Josh Dun owns a dog named Tyler.