Perhaps Naruto and Hinata are on a mission together. It's a long and tiring one. At night, when they stop to rest, Naruto falls asleep sitting up. Hinata, being the kind - hearted person she is, gently guides his head to her shoulder so he can sleep more comfortably. While he sleeps, Hinata might be thinking about her feelings for Naruto and how far they've come in their relationship.
Let's say Naruto is training really hard with Kakashi. After a particularly intense session, Naruto is so tired that he passes out. Kakashi, seeing Naruto's dedication, picks him up and lets Naruto's head rest on his shoulder as he takes him back to the village. On the way, Kakashi could be thinking about Naruto's growth as a ninja and how he has the potential to be one of the greatest.
One possible plot could be that Naruto has been through a tough battle and is extremely exhausted. His friend, say Shikamaru, offers his shoulder for Naruto to rest on while they are waiting for help. As Naruto sleeps, Shikamaru reflects on their friendship and how Naruto has always been so determined.
The fanfic could be about Naruto's training against side sleep. Naruto realizes that side sleep is a state that can enhance a ninja's chakra control if mastered properly. However, it's extremely difficult to enter this state consciously. So, he starts training with Kakashi and Sakura. Kakashi tries to teach him some mental techniques while Sakura helps him with the physical aspects of relaxation. After many failed attempts, Naruto finally manages to enter the side sleep state and finds that his chakra has become much more powerful and refined.
One possible plot could be that Naruto and Shikamaru are on opposing sides in a strategic battle. Naruto might be brash and ready to go all - out, while Shikamaru is using his intelligence to outwit Naruto. Maybe it's a sparring match within the Hidden Leaf village where they have different goals. Naruto could be aiming to prove his strength, and Shikamaru is trying to show that brains can overpower brawn. They might start with some basic jutsu exchanges, and as the fight progresses, Naruto realizes he needs to use more than just his raw power to defeat Shikamaru.
Perhaps in the 'aurpra in deep sleep' fanfic, AURPRA is in a deep sleep as a result of an accident. While asleep, AURPRA has vivid dreams that are actually glimpses into a parallel universe. People around AURPRA start to notice strange phenomena related to AURPRA's sleep state and try to figure out what's going on.
Well, I haven't come across a 'naruto sleep shoulder fanfic' directly. However, think about the relationships in Naruto. For example, Naruto might be sleeping on Sasuke's shoulder during a long journey in a fan - created scenario. To find such a fanfic, you can also join Naruto fanfic communities on Reddit or other forums and ask if anyone has read or written a fanfic with this concept.
One possible plot could be that Naruto wakes up in the middle of the night, unable to move due to sleep paralysis. He might see strange shadows or figures in his room that seem menacing. Maybe he tries to use his chakra but finds he can't in this state. As he lies there, he could start to recall past traumas or fears, and the experience could make him question his own strength and courage.
A possible plot could be that the apple in the sleep experiment starts to glow during its 'sleep' and the scientists are baffled. They try to find out what causes this strange phenomenon. Maybe it has something to do with the apple's genetic makeup or the chemicals it was exposed to. Another idea is that the apple seems to be dreaming and the scientists try to interpret what these 'dreams' could mean for the apple's well - being.
The plot could involve a person having a difficult time in life, perhaps going through a lot of stress or sadness. Then, an angel appears. The angel gently cuddles the person as they sleep, bringing a sense of peace and comfort. In the story, the angel might also be on a mission to protect the person from nightmares or negative forces.
Maybe in the fanfiction, baby Naruto has a nightmare. Kushina then holds him close, reassuring him that he's safe. She could tell him stories about his father, Minato, and how they both love him very much. This would comfort Naruto and he'd soon fall back asleep in her warm embrace.
It could be about Naruto's long and arduous journey. Maybe he has a mission that requires him to travel great distances. Along the way, he faces many challenges and has to overcome his own doubts and fears. He might meet new allies and enemies, and his experiences during this journey could change his perspective on life and his ninja way.
They could be on a camping trip and have to share a small tent due to some unforeseen circumstances, like a storm destroying the other tent. So they sleep together just to stay warm and safe.