Perhaps there is a mystery surrounding a missing magical artifact from the magic school's library. A group of students decides to investigate. As they dig deeper, they find out that the artifact has a connection to a powerful and dark wizard from the past. They must face many obstacles and dangerous creatures as they try to retrieve the artifact and prevent it from falling into the wrong hands.
There could be two students from different magical backgrounds (like one from a family of light magic and the other from a family of dark magic) who become friends at the magic school. Their friendship is frowned upon by many in the school. Together, they have to face prejudice and also a common enemy that is trying to start a war between the two magical factions. They prove that friendship can bridge any divide through their adventures.
One idea could be an OC who has a special power related to time. They could accidentally send the Magic School Bus to different eras in history, creating all sorts of chaos and educational adventures. For example, they might end up in the Ice Age and have to figure out how to survive and learn about the animals and climate of that time.
A possible plot in High School DxD Torture Magic Fanfiction is that there is a magical artifact that is powered by torture magic. Different factions in the High School DxD world are vying for this artifact. The story could follow the main characters as they try to either obtain the artifact for good reasons or prevent it from falling into the wrong hands. Along the way, they face many challenges related to the torture magic associated with the artifact, like having to resist its corrupting influence.
One idea could be a crossover with 'Harry Potter'. The Magic School Bus could take the students to Hogwarts. They could learn about magic from the Hogwarts professors and compare it with their own scientific knowledge. Maybe they'd help Hermione solve a complex potion problem using scientific methods.
One idea could be exploring the backstory of Tatsuya more in - depth. Maybe his early training days and how he developed his unique abilities.
One idea could be a character discovers a hidden magic within themselves that is connected to Aphmau's world. For example, they might find out they can control a special type of magic like shadow magic which is rare in the Aphmau universe. This could lead to a journey of self - discovery as they try to master it while also facing challenges from those who fear this new power.
Well, you could do a fanfiction where there's a mystery in the high school. For example, there are strange disappearances in the school and a group of students decide to investigate. It could also be about a love triangle between the most popular student, the nerd, and the athlete. And a third idea might be a story about a high school that has a magical element, like a hidden room that transports students to different worlds.
One idea could be a shy student who falls for the most popular kid in school. They start off as study partners and slowly feelings develop. Another could be two rivals in a high school club who end up dating after getting to know each other better during a big competition. And a third idea is a new student who starts dating someone who shows them all the hidden gems around the high school campus.
Maybe it's about a mailroom in a magic school where strange and magical letters are delivered. It could involve a student who discovers a hidden secret in one of the mail items.
One idea could be a new student arriving at the Anti Magic Academy with a mysterious power that no one has seen before. This power could either be a great asset or a source of fear among the students and faculty.