H2O: Footprints in the Sand, Another Recommendations
1. Main character with a physical illness moves to the countryside.
2. He befriends a girl who is an outcast/bullied by the social group they belong to.
3. He protects the girl even though he doesn't know her backstory.
Whilst watching Another I was thinking how similar it was to H20, it wasn't the story line but more the characters. You have the boy who is sick and moves to the country side and the classmates who keep secrets, as well as the girl who is treated different from the rest of the class. H20 is what Another would be without Horror.
They both revolve around a weak, clueless protagonist who moves to a new, isolated town as a transfer student. In both, he befriends a girl who everybody else hates and ignores because of the village's customs and beliefs.