Maybe Ron gets drunk on butterbeer and says some mean things about Harry in public. Harry is embarrassed and hurt. But later, Ron sobers up and realizes what he's done. Harry forgives him because he values their long - standing friendship. The story could then focus on how they both grow from this experience, with Ron learning to control his tongue and Harry learning to be more patient.
A plotline could be that Ron betrays Harry's trust by sharing a secret with someone he shouldn't. Harry is initially furious but then realizes Ron was manipulated. Harry forgives Ron, and they work together to fix the mess caused by the shared secret. For example, if the secret was about a new spell they were developing, they have to stop the wrong people from using it.
In a fanfiction, Ron could be influenced by a dark object that makes him act against Harry. Once the object's influence is removed, Ron is full of regret. Harry, seeing Ron as a victim of dark magic, forgives him easily. The rest of the story might be about them finding and destroying other such dark objects to prevent more harm to their friends and Hogwarts.
One reason could be that Ron abandons Harry when he needs him the most. Like in a dangerous situation, if Ron runs away leaving Harry alone to face the threat, Harry would find it hard to forgive such cowardice.
Because their friendship is so deep - rooted. They've been through so much together, like facing Voldemort. So, even if Ron makes a mistake, Harry knows the overall value of their bond.
A plotline could be that Ron is killed in a magical accident during an experiment gone wrong. This accident might be related to some new, dangerous magic that he was trying to master. His death would shatter the trio. Harry would feel guilty because he might have been involved in the experiment in some way. Hermione would be grief - stricken and would pour herself into research to try and understand what went wrong. The fanfic could then explore how the wizarding community reacts to Ron's death, with some blaming Harry and Hermione, and others mourning the loss of a great wizard. It could also show how Harry and Hermione have to grow and become stronger individually to face the challenges that come their way after Ron's death.
It could be a situation in an alternate universe where Ron and Harry are in a relationship. The blindfold could be part of a romantic game or a way to heighten the senses. Harry trusts Ron completely, and the kiss is a moment of deep connection. As they explore this new aspect of their relationship, they might face challenges from their friends or the wizarding world around them that doesn't quite understand their relationship.
It could also be due to a long - standing pattern of behavior. If Ron had been constantly critical or undermining of Harry in the fanfiction, Harry might reach a point where he just can't forgive. Say Ron always made fun of Harry's decisions in front of others, which gradually eroded Harry's trust and patience.
It could be due to a misunderstanding that got out of hand. Ron and Hermione might have been involved in something that Harry misinterpreted as a sign of their disloyalty. For instance, they were secretly working on a project that Harry thought was against him, but in reality, it was for his own protection. However, because of the lack of communication, Harry's anger and unwillingness to forgive grew.
One possible plotline could be about the Weasley family trying to improve their financial situation. Maybe they come up with a new business idea in the wizarding world, like a magical product that becomes a huge success and changes their economic status. Another could be a story about how the Ministry of Magic regulates the financial system in the wizarding world, and there are some characters who try to manipulate or reform it.
Well, one possible plotline could be a story where a character from the wizarding world, perhaps a powerful wizard, takes on a concubine in a parallel world or an alternate version of the wizarding society. The concubine might be from a different magical culture and their relationship could cause political or social unrest within the wizarding community.
One possible plotline could be that the parrot is a magical pet of a new character who enters Hogwarts. This parrot has the ability to detect dark magic, so it helps the students in their fight against the forces of Voldemort.
One possible plotline could be Harry being secretly trained by an unknown figure to become an assassin against the dark forces. He would have to hide this new identity from his friends at Hogwarts.