Well, perhaps Annabeth decides to surprise Percy at his high school by disguising herself as a new student. She enrolls in the school for a day and joins Percy's class. When Percy sees her sitting there, he can't believe his eyes. She then reveals her true identity during lunch break and they have a sweet reunion, sharing stories about their latest demigod adventures.
Maybe Percy brings her a special gift from his adventures, like a unique seashell. Annabeth would be really happy and they might share a sweet moment in the schoolyard.
One great 'Percy and Annabeth at School' fanfiction is 'School Days in Camp Half - Blood'. It shows their daily adventures in a school - like setting within the camp. They face challenges like new monster threats during classes and exams, which is really exciting.
One common theme is the adjustment to a new environment. Since they are used to the world of Camp Half - Blood, going to a school - whether it's a mortal high school or a special demigod school - is a big change. Another theme is relationship growth. Their friendship or romantic relationship often deepens as they face challenges together at school.
Another great scene is when they are in a school dance in a fanfic. Percy is really clumsy on the dance floor at first, but Annabeth patiently teaches him. It's a sweet moment that shows their relationship dynamics in a new light, away from the usual monster - fighting scenarios.
In most cases, it might not be considered entirely appropriate within the school setting in fanfiction. Schools usually have rules about public displays of affection, and it can also be seen as a distraction to other students. However, in the context of fanfiction, which often bends the rules of the original world, it can be a way to show the intensity of their relationship.
Grover would be a great addition. He could be the quirky sidekick in the high school setting, always getting into comical situations while also providing some sage advice to Annabeth and Percy based on his own experiences. For example, he could help Percy figure out how to ask Annabeth to the prom.
Grover could be a great addition. He could be the goofy but loyal friend who always gets caught in the middle of Percy and Annabeth's drama. For example, he might accidentally spill some secrets that cause more trouble between them. Another good character could be Clarisse. She could be the school bully who has a grudging respect for Percy and Annabeth but still tries to cause problems for them now and then.
There could be a school janitor who is actually an old demigod who retired from the hero business. He could give Percy some valuable advice based on his own experiences. And of course, Percy will surely meet Annabeth's classmates, some of whom could be friendly and some not so much, depending on how they react to the new boy in school.