In a 'naruto goes to prison' fanfiction, it could be that Naruto is tricked into taking the blame for someone else. Once in prison, he meets old foes who are also incarcerated. Instead of fighting them, he tries to understand their motives and in the process, he uncovers secrets about their pasts that were related to some greater threat to the ninja world. This knowledge then becomes crucial for his future actions outside the prison.
One possible plot could be that Naruto is framed for a crime he didn't commit. Maybe someone with a vendetta against him plants false evidence. In prison, he would have to deal with tough inmates and the strict prison regime while trying to prove his innocence.
The plot could involve Naruto being sent to the Blood Prison on a mission. Once inside, he encounters various types of ninjas with different abilities and motives. There could be a mystery surrounding a powerful and dangerous prisoner locked away deep within the prison. Naruto's journey in the Blood Prison could also be a test of his character, as he has to make difficult decisions about who to trust and how to handle the dangerous situations that keep arising. He may even learn some new jutsu from the inmates or discover a hidden power within the prison itself.
It could be a corrupt ninja from another village who wants to get rid of Naruto as he sees him as a threat to his own plans. This ninja could have framed Naruto to send him to prison.
Maybe Danzo could be the main antagonist. He has always been a bit of a shady character in the Naruto series. He could see Naruto as a threat and use his influence to frame him and send him to prison to further his own political or power - hungry goals.
In this fanfiction, Naruto will surely interact with his friends who might be trying to break him out or at least communicate with him from the outside. Inside the prison, he'll encounter inmates with diverse personalities. There could be a wise old prisoner who imparts some valuable wisdom to Naruto. Also, there may be a group of inmates who form a sort of gang within the prison, and Naruto has to either fight them or make peace with them depending on the situation. And of course, there could be a mysterious figure who seems to know more about Naruto's presence in the prison than he himself does, and Naruto will have to figure out this person's motives and identity.
I recommend the novel One Piece: Prison of the Dead. The protagonist Qin Ge accidentally transmigrated to One Piece's world, and there was a prison in his body. This prison could imprison the souls of the dead in various worlds. At the same time, it could also allow people to obtain the abilities of the souls of the dead when they were alive.
Well, one possibility could be that Percy is framed for a crime he didn't commit. Maybe some powerful enemy uses magic or trickery to make it seem like he's violated a major demigod law. So, he's sent to a special prison for demigods. Inside, he has to deal with all sorts of other dangerous inmates, some of whom might be old enemies or just generally bad - tempered demigods. He'd probably try to find a way to prove his innocence and escape while also having to survive the various challenges within the prison.
He could use his transformation jutsu. He could transform into a guard or an inmate who has access to the prison exit areas. Then he could just walk out when the opportunity arises.
The following are some recommendations for novels about the male protagonist being imprisoned for love:
1. [Fenghua World's Supreme Princess Consort: This novel tells the story of a strong male protagonist who does not abuse the female protagonist.] The male lead was a supreme princess consort, which guaranteed a sweet and loving plot.
2. " Boy on the Edge ": This novel described the story of the male protagonist who was imprisoned for love.
3. The Trapped City: This novel also tells the story of the male protagonist who is imprisoned for love.
Please note that the novels recommended above may only be part of the search results. There may be other related novels.