What if there was a young dude living in constant solitude for a reason I can make up later and he is living in the jungle. Usually he can handle himself, but he was hurt fighting a tiger (or some thing idk) He won, but on the way to his dwellings he finds himself fighting a bear. It's just a bad day for him I guess.
But then, the second character just so happens to be in the jungle for whatever reason and hears the commotion, and shoots the bear dead. He's probably a well-off man living on his own, out and about looking for something fun to do. They become instant friends after having saved each other from loneliness (kinda like Robison Crusoe and Tuesday but with more love) And then they go to the house not in the jungle and so forth and hitherto