A plot could revolve around a group of Naruto and Highschool of the Dead characters teaming up to find a cure for the zombie virus. The Naruto characters with their knowledge of strange herbs and medical ninjutsu could collaborate with the Highschool of the Dead students who are more familiar with the modern scientific equipment in the school labs. They would face challenges not only from the zombies but also from other groups who want to hoard the cure for themselves.
One idea could be a crossover where Naruto characters are suddenly thrown into the Highschool of the Dead world. They could use their ninja skills to fight off the zombies. For example, Naruto could use his shadow clones to distract the zombies while others find a safe place. Another plot could involve a Highschool of the Dead character getting ninjutsu powers and having to learn to control them like a Naruto character. Maybe they accidentally use a fire - style jutsu in the middle of the school, causing chaos among the survivors and the zombies.
One idea could be that Naruto's immortality gives him unique abilities in the high - school - during - the - zombie - apocalypse setting. For example, he could use his shadow clones to distract the zombies while he and his friends find a safe haven. Another plot idea might be that Naruto discovers a way to cure the zombie virus using his chakra, but he has to face many challenges and enemies who want to use the cure for their own evil purposes.
A plot idea could be that a group of students suddenly develop Rinnegan powers during a zombie outbreak in their high school. They must then figure out how to use these powers to not only survive but also find a cure. Another idea is that a Naruto - like character from another dimension arrives in the Highschool of the Dead world with Rinnegan and tries to teach the survivors ninjutsu to fight the zombies.
One idea could be to explore the backstories of the minor characters in more depth. For example, the story could focus on a side character's journey before the zombie apocalypse and how they've changed since then. Another plot could be a survival story that takes place in a different location than the original, like an isolated island where they have to deal with not only zombies but also limited resources.
One idea could be a story where Naruto and Sasuke are rivals in high school sports. They compete in track and field events, with Naruto's determination against Sasuke's natural talent. Another could be about Hinata being the shy new girl in school and Naruto slowly befriending her and helping her come out of her shell. Maybe there's a high school ninja club where they all learn and practice ninjutsu in a modern setting.
One interesting plot idea could be a pre - apocalypse story within the Highschool of the Dead universe. Maybe showing how the relationships between the main characters were developing before the zombies showed up. For example, Rei and Takashi's friendship turning into something more complex as they dealt with normal high school drama.
One possible plot could be that the zombie apocalypse hits the ninja high school. Naruto and his friends have to use their ninja skills not only to fight the zombies but also to protect the other students. They could form teams and set up barricades around the school, using their jutsu for both offense and defense.
Well, a plot could be that Naruto is a transfer student in a high - school that has a special ninja training program. The girls in the harem are all in different levels of the training. Hinata, being the shy one, tries to impress Naruto during training sessions. Ino, on the other hand, is more competitive and sees Naruto as a rival at first but then realizes her feelings. And Tenten could be the girl who helps Naruto with his weapon - based ninja skills in the high - school setting. They all end up in a harem - like situation around Naruto as he shows his growth and determination in the ninja high - school.
One idea could be a high - school sports competition where Naruto and Sakura are on opposing teams. Naruto's determination and Sakura's skill could lead to some intense rivalry and unexpected teamwork in the end. Another plot could be a school dance where Naruto tries to ask Sakura in a really clumsy but endearing way, while Sakura is dealing with her own insecurities about going with him. A third idea is a high - school project where they are paired together and have to learn to work with each other's different strengths and weaknesses to succeed.
Well, a plot could revolve around a mystery that involves both worlds. Maybe there is an ancient artifact that has the power to disrupt the balance between the Naruto universe and the Highschool DxD universe. Characters from both sides have to work together to find and protect this artifact. This would lead to a lot of character development as they learn about each other's cultures and values while on this quest.
One idea could be Naruto being the class clown who is secretly a really talented artist. Another could be a love triangle between Naruto, Sasuke and Sakura in high school, with Naruto trying to win Sakura's heart while Sasuke is the brooding, mysterious rival. Maybe there's a big school competition and Naruto has to lead his team to victory against all odds.