He'd probably be shocked at first but then jump into action. Naruto is used to facing tough situations. He'd likely start fighting off zombies right away, using his physical strength and ninja techniques.
One possible plot could be Naruto finding himself in the world of High School of the Dead. Maybe his ninja skills would come in handy against the zombies. He could use his shadow clone jutsu to distract the undead while he tries to find a safe place for the other survivors. His strong willpower might also inspire the other students to keep fighting and not give up hope.
Sakura could be one of the members. In the original Naruto series, she has a connection with Naruto. In this fanfiction, in the high school setting, she could continue to be drawn to Naruto's growth and strength. Another could be Rei from 'High School of the Dead'. She is a strong - willed character, and Naruto's heroic nature might attract her. And then there could be Tenten. Her weapon skills could be useful in the zombie - infested high school, and she might develop feelings for Naruto as they fight together.
The plot might develop with Naruto having to adjust to the new rules of the 'High School of the Dead' world while also dealing with the harem situation. Maybe some of the harem members have their own special skills, like one could be good at first - aid. Naruto would team up with them, using his combat skills and their knowledge to keep the group alive. As for the harem, Naruto's positive attitude towards everyone could lead to some jealousy among the female characters, creating interesting relationship dynamics.
Well, for starters, the settings can be combined. The high school from High School of the Dead can be the new location for Naruto characters. You can have Naruto - style classrooms where they learn not just regular subjects but also ninja techniques. And the zombies can be added to this mix as a new threat that the ninja - students have to face.
The ending of High School of the Dead manga is quite intense. The survivors face numerous challenges and the story reaches a climactic point with some unexpected twists.
In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.
For Naruto, high school might be a place where he tries to fit in while still holding onto his unique personality. He could be a bit clumsy in social situations but always ready to stand up for what's right. Kushina would be the girl with a fiery spirit. She would be good at academics and sports, but she might have a hidden vulnerability. When she meets Naruto, he helps her to show that side more and they both grow as characters in the high school environment.
Naruto's high school life would probably be loud and full of action. He'd be involved in sports, trying to be the star athlete. He'd also have a big group of friends. Hinata, in contrast, would have a quieter high school experience. She'd focus on her studies and maybe some art or other quiet hobbies. She'd have a smaller, closer - knit group of friends.