A love triangle plot within the school setting. Maybe the protagonist falls in love with one of the band members, but another character also has feelings for the same member. This could create a lot of drama and tension, especially with the backdrop of the school environment and the boys' budding music careers.
A mystery - based plot would be cool. For example, a strange event occurs at their school that the band members and the fanfiction protagonist have to solve together. It could involve lost lyrics or a missing instrument that has some sort of magical power related to their music.
One idea could be a time - travel plot where a fan somehow gets transported into the 5 Seconds of Summer's school days. They could interact with the band members as they were before fame, and maybe even influence their musical journey.
Another plot could be that Summer faces some kind of personal attack outside of the band that makes her question her place in the School of Rock world. For example, she might be bullied by other music students. The fanfiction could detail how she copes with this hurt, and how her friends in the band support her and help her regain her confidence.
Some fanfictions are based on the idea of time - travel. For example, one of the band members goes back in time and meets their younger selves. This can lead to self - discovery and changes in their present - day lives. Another popular one is the 'bandmate - in - distress' storyline. One of them gets into some kind of trouble, like getting sick right before a big show, and the others have to figure out how to save the day. There are also those that explore their family relationships, like how their families react to their fame.
The summer dragon could be the key to saving a kingdom that is suffering from an eternal summer. A group of adventurers sets out to find the dragon and convince it to use its power to restore the normal cycle of seasons. Along their journey, they face many challenges like treacherous terrains and other dangerous magical beasts.
One idea could be a time - traveling adventure where Summer and Morty end up in a parallel dimension where their roles are reversed. Morty is the confident, popular one and Summer is the nervous sidekick for a change.
One idea could be a story where Pyrrha and Summer are brought back to life in an alternate reality. They then have to team up to face a new, powerful threat that is endangering their world. Another plot could involve a pre - RWBY story where Pyrrha and Summer meet during a training mission and learn from each other's skills.
One interesting plot idea could be the Digimon characters getting transported to a different digital world during the events of Summer Wars. They could encounter new types of Digimon and have to form alliances to survive. Another idea is that a human character from the Summer Wars universe somehow gains the ability to enter the Digimon world and has to learn how to control their newfound powers. Maybe a group of Digimon come to the human world during Summer Wars and cause chaos, and the main characters have to figure out how to send them back while also dealing with the normal chaos of the Summer Wars event.
Another plot idea is a crossover with a time - travel themed story. The characters from Summer Wars are sent to different time periods, like ancient Rome or the future. They have to adapt to the new cultures and technologies while also trying to find a way back home. Along the way, they might change historical events or gain knowledge that will help them save their own world from a potential threat.
Perhaps Si is transported back in time to when Summer was alive. Si then has the chance to interact with Summer directly. They could become friends and go on adventures together. Along the way, Si could learn valuable lessons from Summer and also change some small events that have a big impact on the future of the RWBY world.
A great plot could be centered around the Summer Maiden's relationships. For example, she might have a forbidden love with a character from the other side, like a member of Salem's faction. This would create a lot of internal conflict as she has to balance her feelings with her duty as a Maiden. Or perhaps she has a deep friendship with a character who is in danger, and she has to use her powers to save them from a great threat.
One idea could be exploring Belly's life after the events of the series. Maybe she has to deal with long - distance relationships while at college. Another could be a prequel that shows the summers before the first book, like how the friendship between the characters developed. A third idea might be a story where one of the side characters gets their own love story, like Jeremiah's friend finding love in the same beach town.