It could be a group of outcast ninjas who have a grudge against the Hidden Leaf Village. They target Tenten as she is an easy target for them to vent their anger on. They might be jealous of the Hidden Leaf's prosperity and think by abusing Tenten, they can send a message to the village.
Well, one possible plot could be that Tenten is being held captive by some rogue ninjas who are abusing her for information. Naruto, with his strong sense of justice, discovers her situation. He uses his shadow clones to create a distraction and then swoops in to rescue her. Afterward, they form a closer bond and Naruto helps Tenten overcome the trauma of the abuse.
It could be a group of outcast ninjas who have a grudge against Konoha. They see Tenten as an easy target since she is often on solo missions or training alone. These ninjas might be using cruel and unethical methods to try and break her spirit or get some sort of advantage over Konoha.
In this fanfiction, Tenten might be in a mission where she is captured by an enemy village. They are abusing her to get information about Konoha. Naruto, who is out on a search for her, uses his shadow clones to infiltrate the enemy base. Once he finds Tenten, he battles the captors. His unwavering determination and the power of the Nine - Tails' chakra help him defeat them all. He then rescues Tenten and they make their way back to Konoha together, with Tenten being very grateful to Naruto for saving her.
I'm not sure who Gi is in this fanfiction as I haven't read it. But it could be an original character created by the author of the fanfiction, perhaps a villain who poses a threat to Tenten.
Well, in fanfictions there could be various ways. He might use his Rasengan to create an opening in Gi Sensei's defenses and then rush in to save Tenten. Another possibility is that Naruto uses his speed and agility, enhanced by the Nine - Tails' chakra perhaps, to dodge Gi Sensei's attacks and reach Tenten before she gets hurt.
Well, without reading the 'naruto saves tenten from gi' fanfiction, we can only speculate. It could start with Tenten getting into a situation where she is captured by Gi. Naruto then gets wind of it and sets out on a mission to save her. Along the way, he might face challenges like other enemies or traps set by Gi. When he finally reaches Tenten, he might have an epic battle with Gi. And after rescuing Tenten, they might share a moment of gratitude and friendship, strengthening their bond within the Naruto universe.
Well, it could be that Naruto stumbles upon a strange situation in the fanfiction world where Tenten is in some sort of distress related to the gay fanfiction plot. Maybe he uses his ninja skills to disrupt the flow of the fanfiction and rescue her. He could use his shadow clone jutsu to create distractions and then whisk Tenten away to safety.
One possible antagonist could be a rogue ninja from another village. They might target Tenten for her unique weapon - handling skills, thinking they can use her to create powerful weapons for themselves. Naruto would then have to face this ninja to save Tenten.