Perhaps Naruto is feeling down about his training progress. As he goes to sleep, Kushina enters his room and sits beside him. She shares her own experiences of facing difficulties when she was young and how she overcame them. This helps Naruto to gain new perspective and feel more confident, all within the context of a loving mother - son relationship.
One possible plotline could be that Naruto has a nightmare, and Kushina comes to his side to comfort him. She might hold him and tell him stories about how brave he is, just like his father. This would strengthen their family bond and show Kushina's motherly love.
A plotline could involve Naruto being sick and Kushina staying by his side all night while he sleeps. She could be constantly checking on him, making sure he has enough blankets, and whispering words of encouragement. It would be a heartwarming display of a mother taking care of her son.
Well, if there is such a fanfiction, perhaps there's a plot where some sort of magic or jutsu affects their minds. Naruto might be under a spell that makes him see Tsunade in a romantic way, and Tsunade, being affected by a similar or related jutsu, reciprocates. And so, in this strange situation, they end up in a situation where they'sleep together'. But this is all just speculation based on what could be in a very unorthodox fanfiction.
One plotline could be that Naruto is a wandering ninja who comes across Kushina's village under attack. He decides to help her defend it, and during the process, they discover they have a lot in common, like their love for a certain type of jutsu. This shared interest brings them closer together.
One possible plotline could be that they are on a long and tiring mission together. They find a safe place to rest, and due to the exhaustion, they fall asleep near each other. During their sleep, they might have dreams related to their goals and fears, and when they wake up, they have a deeper understanding of each other. Another could be in a post - war scenario where they are part of a group rebuilding the village. They work so hard that they end up falling asleep in the same room while discussing plans, and this shared moment brings them closer as friends.
One possible plotline could be Naruto's struggle with abandonment issues. Since Kushina left, Naruto might have a harder time finding his place in the village. He could become more withdrawn and have to fight even harder to prove himself. Another could be the search for Kushina. Naruto might embark on a journey to find out why she left and try to bring her back.
One possible plotline could be that Naruto is an orphan found by a different ninja clan. He grows up with different values and skills, and his path crosses with Kushina in a completely non - family - related way. For example, they could meet as rivals in a ninja tournament. Another plotline might involve Naruto being from another village entirely and coming to Konoha on a mission where he teams up with Kushina to fight a common enemy. They then form a bond based on mutual respect and shared experiences rather than a family connection.
One possible plotline could be that Naruto is somehow transported back in time and has to fight Kushina in a misunderstanding. Maybe he's mistaken for an enemy due to some time - warp magic or jutsu gone wrong. Another could be a scenario where Kushina is controlled by an evil force, and Naruto has to fight her to break the control. Or perhaps it's a sparring match in a dream world where Naruto and Kushina test each other's skills without real harm.
One plotline could be that Naruto discovers a hidden power within himself that is linked to Kushina's Uzumaki heritage. This power makes him godlike, and he has to learn to control it while also dealing with the memories and emotions related to Kushina that come with it.
Another plotline could involve the Shinigami within Naruto having some sort of mission related to Kushina. The Shinigami might need Naruto to help Kushina fulfill an unfinished task. As Naruto and Kushina work together, they also get to bond on a deeper level, with Naruto learning more about his mother's past and her love for the village and his father.
One possible plotline could be that Naruto is influenced by some dark force and turns 'evil'. Kushina, having come back to life somehow, tries to understand what has happened to her son. She then embarks on a journey to find a way to reverse the effects, leading to a series of adventures where they interact in different ways, like Kushina trying to jog Naruto's memories of their family bond.
A possible plotline is that the tail plug was a cursed object that was placed on Kushina by an enemy long ago. Naruto discovers this and tries to break the curse. He goes on a journey to find a way to remove the tail plug and free his mother from its negative effects, all while facing various challenges and enemies along the way.