A possible plot is that Snape is cursed and Harry is the only one who can break the curse. As Harry tries to save Snape, he discovers new aspects of Snape's personality. They start to communicate more openly than ever before. Snape, in his vulnerability, shows a side of himself that Harry has never seen. This new - found understanding makes Harry see Snape in a romantic way. Another idea is that there is a prophecy that only Harry and Snape together can fulfill. In their journey to fulfill the prophecy, they grow closer and develop feelings for each other. There could also be a situation where they are both trapped in a magical realm and have to rely on each other to escape, which sparks a relationship.
Well, it could start with Harry having to take private lessons from Snape for some special magic he needs to learn. During these lessons, they begin to understand each other's past traumas and find common ground. Maybe there's a magical bond that forms between them accidentally, like a soul - bond, which makes them feel each other's emotions. This could lead to a slow - burning relationship as they figure out how to deal with this new connection. And also, a plot where they are both on a quest to find a lost magical artifact and in the process, their relationship evolves from animosity to love.
A plot could be that Snape's pet is a phoenix, which is a very rare and powerful magical creature. Harry Potter is intrigued by this phoenix and tries to get closer to it. Snape is initially against this but as the story progresses, he sees that Harry has a pure heart and allows him to interact with the phoenix. This could lead to a bond forming between Harry and Snape through their shared interest in the phoenix.
Well, perhaps in the fanfiction, they are all entered into a magical tournament. Harry, being the young and brave one, Snape with his vast knowledge of magic, and Lucius with his family's resources. At first, they are rivals in the tournament but then realize that there is an outside force trying to manipulate the outcome for evil purposes. So they join forces. Or it could be that a powerful dark magic spell has been cast over Hogwarts, and only the combined magic of Harry, Snape and Lucius can break it. They start off distrustful but as they work together, they form an unlikely alliance.
One idea could be that Harry punches Snape in a moment of extreme frustration after Snape makes yet another snide comment about his father. Then, Harry realizes the gravity of his actions and has to face the consequences within Hogwarts, which could lead to a series of adventures as he tries to make amends while also uncovering some long - hidden secrets about Snape's true motives.
A plot idea might be that Snape, in taking Harry as an apprentice, is actually trying to atone for his past mistakes. He trains Harry in a very strict but effective way, and they end up bonding over their shared experiences with Voldemort. Harry could learn how to better control his emotions and magic from Snape, which helps him in future battles.
One idea could be that Harry is on the run from some dark wizards and hides behind Snape in the middle of a chaotic battle in Hogwarts. Snape, initially annoyed, realizes Harry's dire situation and secretly protects him while still maintaining his cold exterior.
Well, perhaps in the fanfiction, there's a time - travel element. Harry goes back in time and due to some interference in the past, he ends up pregnant. Snape, being the knowledgeable wizard he is, has to help Harry figure out how to deal with it while also keeping it a secret from the rest of the wizarding community. Or it could be that a dark magic artifact curses Harry into this situation, and Snape is the only one who can break the curse, but not without some emotional and moral dilemmas along the way.
One possible plot idea could be that Harry, perhaps from the Harry Potter world, meets an angel in a magical or non - magical setting. They might initially be at odds due to their different natures, but as they get to know each other, they fall in love. Another plot could involve the angel helping Harry with a particular quest or problem he has, and during that process, their relationship develops romantically.
One plot idea could be that Snape discovers Harry has a hidden magical ability during a high - stakes potion - making class. Another could be that they are magically bonded in a strange way that forces them to understand each other's pasts. Maybe Harry finds an old diary of Snape's from his school days and it reveals a side of Snape he never knew.
Perhaps in the fanfiction, Snape and Harry are forced to team up to defend Hogwarts against a new, unknown dark force. They have to rely on each other's skills and knowledge, with Snape using his potions expertise and Harry his courage and Gryffindor - like bravado. Along the way, Snape shares some of his own experiences with dark magic and how to combat it, making Harry a more well - rounded wizard.
One interesting plot idea could be that Snape, in raising Harry, teaches him advanced potions from a very young age. Harry becomes a prodigy in potions, much to the surprise of the other Hogwarts students. Another idea is that Snape's strict but fair upbringing makes Harry more reserved and less impulsive, which changes the way he interacts with his friends. He might be more cautious and calculating in his actions, especially when dealing with enemies like Voldemort.