One possible plotline could be that it's a sign of comfort. Maybe Stiles is having a tough time, and Derek offers his jacket as a form of solace. Another could be a comical situation where Stiles accidentally puts on Derek's jacket thinking it's his own and Derek has a funny reaction.
One popular 'Stiles wears Derek's jacket' fanfiction might be found on Archive of Our Own. You can simply search for the tag 'Stiles wears Derek's jacket' on the site. There are often many creative takes on this scenario, with some focusing on the cuteness of Stiles in Derek's jacket, while others might use it as a symbol of their growing relationship.
One interesting scenario could be that Stiles wears Derek's clothes to feel closer to him. Maybe Derek has gone away for a while, and Stiles misses him. Wearing his clothes gives Stiles a sense of comfort and connection.
One possible reason could be that Derek lost control. Maybe he was in a fight or a highly emotional state, and his werewolf instincts took over, causing his claws to accidentally lash out at Stiles.
A third plotline could involve the community's reaction to Derek and Stiles having babies. Some in the supernatural community might be accepting, while others could be skeptical or even hostile. This could lead to a story about them fighting for their family's right to exist and be respected in their world.
Well, Stiles might become distrustful of Derek for a while. He could pull away from their friendship or alliance.
One possible scenario could be that Derek arrives just in time as Gerard is about to harm Stiles. Derek uses his werewolf strength and speed to fight Gerard off, perhaps with some cool combat moves. He then quickly gets Stiles to safety, like taking him back to the pack house.
One possible plotline could be that Stiles' friends immediately start a search. They might follow clues like strange footprints or a mysterious note left behind. Another could be that Stiles manages to outwit his kidnappers in some way while being held captive, perhaps by tricking them into revealing their weaknesses. Maybe the kidnappers are after something Stiles knows, like a secret about the supernatural world in the fanfiction's setting.
In a Derek x Stiles fanfiction where Derek is in heat, it might involve a lot of drama. Maybe Derek's in - heat state makes him more vulnerable, and Stiles has to protect him. Or it could be a more comical take, like Stiles is completely clueless at first about what's going on with Derek. It could also be a story that delves into the werewolf lore surrounding being in heat and how that affects Derek's relationship with Stiles and the rest of the pack.
One possible plotline could be that Naruto, in his feminine form, is attending a formal shinobi event and has to choose an appropriate and stylish outfit to wear, which could lead to some comical or interesting interactions with other characters.
One possible plotline could be Stiles discovering her demigod powers and having to learn how to control them while also dealing with her alpha female status in her community. This might involve her facing challenges from both the human and supernatural sides.