Well, perhaps Draco initially takes the glasses with the intention of causing trouble for Harry. But as he has the glasses in his possession, he starts to feel a bit guilty or realizes that it's a rather childish prank. He then might return the glasses in a somewhat begrudging yet also slightly friendly way, which could be the start of an unexpected friendship or at least a less hostile relationship between them.
Well, it could be that Draco steals Harry's glasses as a prank. Maybe he wants to embarrass Harry in front of their classmates. He might hide the glasses in a secret place in Hogwarts, like in an old unused classroom, and Harry has to search for them while dealing with his blurry vision.
Maybe it's a form of power play. By taking Harry's glasses, Draco is asserting his dominance. In the wizarding world, status and power are important, and this could be Draco's way of showing that he can take what he wants from Harry, who is often seen as his rival.
Well, it could be that Draco has some sort of bet with Harry. Maybe he wagered his glasses on a Quidditch match or a wizarding duel and lost. So he's demanding them back in a rather forceful way. This could lead to a lot of tension between the two, and their friends might get involved too, trying to either mediate or take sides.
On the other hand, it might lead to a more complex relationship. Maybe Harry starts to see Draco in a different light, as someone who is more than just a one - dimensional bully. He might start to wonder what deeper issues Draco has that would make him do such a thing.
Well, it could be anywhere! Maybe you dropped them in the common room or left them in a classroom.
One possible plot development could be that Harry first goes into denial. He has grown up thinking his situation was normal. But as he realizes he's been abused, he might start to distance himself from those who have been part of the abuse, like the Dursleys. He could then seek out help from his friends at Hogwarts, like Hermione and Ron. They would support him, and together they might try to find a way to deal with the emotional and psychological trauma he has endured.
One possible reason could be to annoy Harry. Draco is often portrayed as a bully in the Harry Potter series, and stealing Harry's glasses is a way to make his life difficult. It could also be a power play, showing that Draco can take something important from Harry.
Well, perhaps in the fanfiction, Harry loses his glasses in the tent. He has to search for them blindly while his friends are out on a mission. It could be a comical scene as he bumps into things in the tent.
One possible plot could be that Harry stumbles upon the Sword of Gryffindor in a hidden chamber in the Forbidden Forest. Maybe he's on a solo quest to find a powerful weapon against Voldemort and the magic of the forest guides him to it. Then he has to figure out how to use its power to his advantage in the upcoming battles.
The snake could be an injured or lost magical creature. Harry, being the kind - hearted person he is, decides to take care of it. As he does, he realizes that the snake has a connection to a powerful wizard or witch who has been lost for ages. This connection then draws Harry into an adventure to find out what really happened to that powerful figure and how it affects the present state of the wizarding world.