In this fanfic, it could be related to a ritual or a test. Annabeth might believe that for Percy to prove his loyalty or strength, he needs to be bare - chested. This could be something specific to the lore or the unique world - building in the fanfic. For example, there could be a prophecy that mentions a sign on Percy's chest that can only be seen when he takes his shirt off, and Annabeth is eager to find out if it's true.
Well, in the context of the fanfic, it might be that she's just teasing Percy. Their relationship could be at a stage where she likes to playfully embarrass him, and asking him to take his shirt off is a way to do that. Also, perhaps there's some sort of magical or special item that she thinks might be hidden under his shirt that could be relevant to their current situation.
One possible reason could be that she suspects Percy has some sort of mark or injury on his torso. Maybe they were in a recent battle or encounter and she wants to check if he's okay.
Percy might be really shy and hesitant at first. He could blush and stutter, not expecting such a request from Annabeth.
In the context of a fanfic, there could be a bet or a dare involved. Percy lost a bet or was dared to let Annabeth take his shirt off. This could lead to some humorous or interesting interactions between them as they both deal with the situation.
One possible scenario could be that Percy got injured and Annabeth needs to tend to his wounds on his torso, so she takes his shirt off. For example, he might have been scratched by a monster during a battle, and she has to clean and bandage the wound quickly.
Perhaps Percy refuses to take on a certain task that Annabeth believes is crucial. It could be something related to saving a friend or retrieving an important item. His refusal might seem cowardly to Annabeth, without her realizing that Percy has some other valid concerns or reasons for not doing it right away.
It could be a story where Percy takes his shirt off during a training session. Maybe he's getting ready for a really intense sparring match and removing his shirt is part of his pre - fight ritual to show his determination and focus.
It might be that Naruto has found a new power or ability that makes the prosthetic unnecessary. For example, he could have developed a new form of chakra control that allows him to function without it. Also, perhaps he is about to engage in a fight where the prosthetic would be a hindrance rather than a help, like if he needs to be more agile and the prosthetic is weighing him down.
It could be jealousy. Maybe Annabeth is getting more attention in school, like from teachers or other students, and Percy, feeling left out or overshadowed, resorts to bullying as a way to bring her down.
It could be that she's homesick. Despite all the adventures, sometimes the longing for home can be overwhelming. Percy would comfort her by sharing his own feelings of missing his mother and how they can make new homes with their friends. He might hold her hand and tell her that their friends are like family now.
Perhaps it's part of their banter. In their relationship, they often tease each other. Annabeth calling Percy stupid could be a form of affectionate ribbing, not actually meaning that she thinks he's truly stupid but just a way to playfully get on his nerves.
Well, perhaps Percy plans this elaborate scheme to ask Annabeth out. He might enlist the help of their friends, like Grover. Grover could set up a picnic in a beautiful meadow. Percy then shows up with a bouquet of Annabeth's favorite flowers and asks her out. She would be touched by the effort he put in and say yes. Then they start planning all the things they want to do together on their first official date.