Friendship turning into something more is also quite common. The characters already have pre - existing relationships in the show, and in the fanfic, those bonds can develop into romantic and gay relationships. It often involves a lot of emotional development as they realize their feelings for each other.
Mystery and adventure themes are sometimes incorporated into the gay fanfic as well. Since the original 'House of Anubis' has elements of mystery, fanfic writers may use that backdrop to add more depth to the gay relationships. For instance, the characters might solve a mystery together while also dealing with their new - found romantic feelings.
One common theme is the exploration of unrequited love. For example, a character might have a secret crush on another character within the 'House of Anubis' setting but be afraid to admit it due to the social environment or fear of rejection.