A possible plot is that an evil force is threatening the world, and only Naruto, with the help of his goddess harem, can stop it. The goddesses each have a piece of the solution. A fire goddess has the ability to create a powerful shield, a earth goddess can manipulate the terrain to their advantage, and Naruto has to bring them all together to defeat the evil.
Perhaps Percy discovers a hidden power within himself that is linked to the goddesses. This power attracts the goddesses to him, and they believe that by being in his harem, they can gain some advantage. However, Percy is initially hesitant as he is used to a more normal life. But as he gets to know the goddesses better, he starts to develop feelings for them, and they all have to figure out how to co - exist in this unusual relationship.
One idea could be that the death goddess has the power to bring back characters from the dead in the Naruto universe, but at a great cost. Maybe she offers Naruto this chance to revive his parents, but in return, he has to sacrifice some of his own chakra forever.
One idea could be that the cat goddess uses her powers to help Naruto master a new form of jutsu. Maybe she can see the potential in Naruto that others overlook and guides him in a spiritual journey to unlock this power. For example, she might lead him to a hidden place in the forest where he can train without distractions.
Well, a plot could be that Kushina is a reincarnated goddess. She doesn't know it at first, but she starts having strange dreams and premonitions. As she discovers her true nature, she has to learn how to use her goddess - like abilities, which include things like super - speed and the power to heal any wound. She then uses these powers to fight against a new and powerful enemy that threatens the ninja world.
One idea could be that Naruto, with his ninja skills, gets transported to Starfire's universe. There, his unique abilities draw the attention of many characters, leading to the formation of an accidental harem. For example, his ability to make shadow clones might be seen as a very useful and cool power. Another plot could involve a common enemy that forces Naruto and Starfire, along with other characters who are part of the harem, to work together. This could lead to some interesting dynamics as they all come from different backgrounds and have different ways of fighting.
One idea could be that a Saiyan character somehow ends up in the Naruto universe and due to their unique powers, attracts a harem. For example, they might save a group of ninja from a powerful enemy using their super strength and speed, and the ninja, both male and female, become intrigued by this new and powerful being.
One idea could be that Naruto and Deadpool end up in a strange multiverse situation where they meet various female characters from their respective universes. They then have to team up to protect these females from a common enemy, and in the process, a harem - like dynamic forms as the female characters develop feelings for them.
The OC could be a descendant of a powerful clan that was thought to be extinct. Their presence in the Naruto world stirs up interest among many characters. The OC's knowledge of ancient jutsu and their kind heart draw in characters like Kakashi, Shikamaru, etc. into a harem. The OC then has to navigate the complex relationships while also trying to keep their clan's secrets safe.
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.
Maybe the island has some sort of magic that makes the women on it more attracted to Naruto. For example, it could be a chakra - related magic. As Naruto tries to figure out how to leave the island, he has to deal with the complex relationships that are developing among him and the female characters, like Sakura, Hinata, and Ino.