One possible plot could be that they are on a mission together and end up in a dangerous situation where they have to take shelter in a small, safe place. There's only one bed or sleeping area, so they have to share it out of necessity. Naruto, being his respectful self, tries to keep his distance while Kurenai, as the more experienced ninja, assures him it's okay. They end up sleeping in the same area but nothing inappropriate happens, and they wake up to continue their mission.
In a non - adult fanfiction, it could be set in an alternate universe where Naruto and Kurenai are part of a team on a long - distance journey. They come across a strange inn with only one room available. They both decide to stay in the room, and while Naruto is initially worried about propriety, Kurenai tells him not to be silly. As they sleep, Naruto has a nightmare about his past and Kurenai comforts him in a very platonic way. This story could focus on their friendship and mutual respect.
It could be that they are attending a ninja conference in a far - away land. The accommodation provided is scarce and they end up having to share a room. Naruto is his usual easy - going self and Hanabi is a bit shy at first but then realizes that Naruto is just a friend. They both go to sleep in the same room, Naruto on the floor and Hanabi on the bed. During the night, Hanabi might have a nightmare about the safety of the village and Naruto wakes up to comfort her, showing their friendship and mutual respect for each other in this fanfiction setting.
Yes, it's possible that there are such fanfictions. But in the Naruto world, Naruto and Kurenai don't have a relationship like that in the original plot. Fanfiction writers sometimes like to play with different pairings and situations. If there is one that is appropriate for all audiences, it would likely be a creative and different take on their relationship, like a situation where they are in a strange, perhaps magically - influenced situation where they have to share a sleeping space in a very innocent way.
Well, perhaps in this fanfiction, Kurenai somehow gets involved in Naruto's life in a very maternal way due to some unforeseen circumstances. For example, she might be the only one who can understand a new power that Naruto has awakened. So, she decides to guide him like a mother would. She would teach him how to control this power, and also give him emotional support which he lacks so much. In the process, their bond grows stronger, and they face many challenges together, like fighting against new and powerful enemies who are after Naruto's power.
Perhaps there was a misunderstanding. Kurenai might have thought Naruto was involved in something bad. For example, she could have been misled to believe Naruto was working with a group of rogue ninjas. So she attacks him, and Naruto has to prove his innocence while also dealing with her attacks.
One possible plot could be that after the war, Naruto and Kurenai start to work closely together on rebuilding the village. As they spend more time together, they develop feelings for each other. Eventually, they get married and face challenges like dealing with the expectations of the village and Naruto's duties as a hero while also building their own family.
The plot might involve Kurenai seeing Naruto as a kindred spirit. Maybe she lost someone dear and sees in Naruto the same pain and determination. She adopts him and starts to teach him about the importance of family and bonds. Naruto could then grow up with a stronger sense of self - worth. He might also become more confident in his abilities earlier because he has Kurenai's guidance. This could change the way he approaches his training and his interactions with the likes of Sasuke and Sakura.
In this fanfiction scenario, Kurenai could also help Naruto with his emotional control. Naruto has a strong will but sometimes his emotions can get the better of him. Kurenai, with her calm and collected nature, could teach Naruto how to stay focused and in control during intense situations. For example, she could use her own experiences to show Naruto how to channel his emotions into strength rather than letting them cloud his judgment. This would not only improve his combat abilities but also his decision - making skills.
Well, it could be that Kurenai is somehow deceived into believing Naruto has done something really bad. Maybe she's tricked by an enemy who fakes evidence against Naruto. So, in her misunderstanding, she turns against him.
Well, it could be about Kurenai having some secret connection to Naruto as his sister. Maybe she discovers this truth and has to deal with the implications. For example, she might have to protect Naruto from new threats while also coming to terms with her new - found family relation.
In such a fanfiction, maybe Kurenai could help Naruto with his stealth skills. Since she's an expert in genjutsu, she might teach Naruto how to use genjutsu more effectively in battles, like against the Akatsuki members.