Another storyline could be that the OC is a transfer student from a military family. He or she has some combat training. Shizuka, on the other hand, is the one who keeps the group's morale high. The OC uses his or her skills to protect Shizuka from zombies and other threats. Over time, they realize they are falling in love while also trying to figure out a way to escape the chaos of the zombie - infested world.
One possible storyline could be that the OC is a new student who quickly befriends Shizuka. They end up having to rely on each other during the zombie apocalypse. For example, the OC might have some unique survival skills like being able to find hidden shelters, and Shizuka uses her medical knowledge to keep them healthy. Together, they form a strong bond and help other survivors as well.
A possible fanfic could involve the OC being a scientist who teams up with Shizuka. They might be working on a cure for the zombie virus. Their relationship could develop as they face various challenges and close calls with the undead. This would bring out different sides of both characters.
The OC can be given special physical abilities. For example, being extremely fast or having great strength. This would help in situations like escaping from zombies or fighting off attackers. In the story, the OC could use these abilities to save Shizuka from dangerous situations, showing his or her strength.
First, you need to develop your OC well. Give them a backstory, personality traits, and goals. For example, if your OC is a former athlete, that could influence how they handle the zombie apocalypse. Then, think about how they would interact with Shizuka. What would be their first meeting like? A tense encounter or a more friendly one?
One idea could be creating an OC who is a master hacker. In the chaos of the 'Highschool of the Dead' world, this OC could use their skills to hack into security systems, gather information about the zombie hordes or even try to find a possible cure. For example, they might hack into a military base's communication system to see if there are any rescue operations planned.
One possible storyline could be how the Hidden Leaf Village copes with his death. Maybe there are power struggles as different clans vie for leadership in the absence of Naruto's unifying presence.
One interesting storyline could be an OC (Original Character) who has a unique survival skill like being able to quickly build hidden shelters. This OC might use their skill to protect a group of survivors from a horde of walkers. Another could be an OC with a medical background who tries to find a cure for the zombie virus within the world of The Walking Dead.
One possible storyline could be that Naruto died in a great battle against a powerful new enemy. His friends then have to deal with the grief and the power vacuum his death leaves. For example, Sasuke might feel a deep sense of loss and guilt, as Naruto was his closest friend and rival. Another could be that Naruto was assassinated by a hidden organization within the ninja world, which then leads to a mystery that his friends and allies have to solve to bring justice to his death.
One interesting storyline could be the oc kid's struggle to find their place in the post - apocalyptic world. They might have to learn survival skills quickly while also dealing with the emotional trauma of losing their family. Another could be their encounter with a group of survivors who initially don't trust them but eventually become like family.
One possible storyline could be that Naruto, as a yokai, has to hide his true identity in the Highschool DxD world. He might get involved in the power struggles between different factions while also trying to fit in at school. Another could be that he uses his yokai powers to help out the main characters in Highschool DxD, like Issei, in battles against their enemies.
One possible storyline could be Francis and Zoey getting separated from the rest of the group during a horde attack. They then have to rely on each other's skills to survive, with Francis using his brute strength and Zoey her sharpshooting. Another could be a story where they discover a hidden safe zone that seems too good to be true and must figure out if it's a trap. Maybe they also find an abandoned research facility that holds the key to a possible cure, and they have to protect it from other survivors who want to use it for their own gain.