Well, it could be a story where Rin and Shiemi are on a mission together. As they face a powerful demon, Shiemi gets injured. Rin, worried sick, nurses her back to health. In a moment of relief and new - found closeness after the ordeal, they share a kiss. It's a sign of their growing bond and the start of a deeper relationship.
It could end happily with them becoming a couple and continuing to fight demons together. They support each other in their exorcist duties and their relationship grows stronger over time.
Yes, there might be. The Naruto and Blue Exorcist fandoms are both quite large, and it's not uncommon for fans to create crossover fanfictions. You can try searching on popular fanfiction websites like Fanfiction.net or Archive of Our Own.
One possibility could be that his relationships with other characters would change drastically. For example, his friendship with Yukio might become more protective on Yukio's part as he now has a sister - like figure in Rin. Also, his interactions with the other exorcist trainees could be different. They might be more hesitant around him as a girl, or some might be overly friendly in a different way.
Since 'lemon' usually implies adult content, it might have inappropriate sexual descriptions involving Rin and Shiemi. But this kind of content is not in line with the original spirit of the work and is also not suitable for general audiences.
It could be about Naruto somehow ending up in the world of Blue Exorcist and taking on the role or having the abilities of Rin. Maybe he has to fight demons in the Blue Exorcist style while still having his Naruto - like skills.
There are many interesting fanfictions centered around Rin's tail collar in Blue Exorcist. Some might explore the significance of the collar in his journey as an exorcist. It could be a symbol of his demon side that he constantly has to manage, and fanfictions may delve into how he feels about it on a deeper level.
I'm not sure specifically about 'rin and shiemi lemon fanfiction' as it might involve inappropriate or uncanonical content. But you can try looking for general Rin and Shiemi fanfiction on popular fanfiction platforms like Archive of Our Own. They often have a wide variety of well - written stories that focus on their relationship in a more appropriate way.
Love and friendship are also big themes. The relationship between Rin and the OC can range from a slow - burning friendship that turns into love, to an instant attraction. In many stories, they support each other through difficult times, like when facing powerful demons or dealing with the politics within the exorcist community.
One effective way is to show Rin's loss of interest in things he used to enjoy. For instance, if he used to love training or cooking, suddenly he has no enthusiasm for it. His appearance can also change. He might look disheveled, with messy hair and dark circles under his eyes. Writers can also use flashbacks to his happier times and then contrast them with his current depressed state. By showing how much he has changed, it emphasizes the depth of his depression. And his reactions to small things can be exaggerated. A minor setback might make him feel completely defeated, which is a sign of his fragile mental state.