A time - traveling rogue from their own era who has followed them to Kagome's time. This character has his own agenda which involves causing chaos in different time periods. He sees Sango and Miroku as obstacles to his plans and tries to eliminate them. He might have some knowledge of modern technology from previous travels and uses it against them.
A fanfiction could focus on their relationships. For example, how Sango and Miroku's relationship develops further with Kagome and Rin as witnesses. Maybe Kagome gives Sango some advice on dealing with Miroku's flirtatious nature, and Rin looks up to them as a couple, learning about love and relationships from them.
In a fanfiction, there could be a prophecy about four individuals who will bring balance to a certain region. Kagome, Sango, Rin and Miroku are thought to be those four. But there are also those who don't want the balance to be restored. So, they constantly face attacks and attempts to stop them. They travel from place to place, gathering allies and learning more about the prophecy. Miroku studies ancient texts for more details about the prophecy, Sango trains with local warriors to improve their combat skills, Rin helps with diplomatic relations among the different groups they meet, and Kagome uses her powers to protect them from magical attacks.
Maybe a demon that has somehow managed to cross over into Kagome's time without being fully noticed at first. This demon could be after Shippo for some reason, perhaps because of his connection to Inuyasha or his own unique fox abilities. As Shippo and Kagome start to figure out what's going on, the demon becomes the main source of conflict in the story.
Yes, there are some really nice ones. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Miroku and Sango kiss' in the search bar and you'll likely find several stories that focus on their relationship and such romantic moments.
One great 'miroku and sango fanfiction' is 'The Unspoken Bond'. It beautifully explores their relationship development. Another good one could be 'Journey Together' which takes them on an adventure and shows how they support each other. And 'Love in the Midst of Chaos' is also a popular one that delves into their feelings during a difficult time.
One common theme is their relationship development. Since they are a couple in the Inuyasha series, many fanfictions explore how their relationship grows and deepens over time. Another theme is their adventures together. They often go on quests with Inuyasha and the others, and fanfictions might focus on their roles and experiences during these adventures.
It could be a powerful dark spirit from Kagome's world that somehow manages to cross over to the Naruto universe and starts causing chaos. This spirit might be immune to normal ninja attacks and require Kagome's spiritual powers to be defeated.
For Sango, her pregnancy could show a more vulnerable side. Usually strong and fearless in battle, she now has to deal with the physical and emotional changes. This can make her more empathetic towards other mothers or those in need. Miroku, as a soon - to - be father, might become more responsible. His usual carefree attitude could shift as he realizes he has a family to take care of.
I haven't actually read this specific 'Miroku and Sango Lemon Fanfic' in detail. But generally, fanfics about these two characters can be really interesting. They often explore the relationship between Miroku and Sango in unique ways that might not be fully explored in the original work. If it's well - written, it could add more depth to their characters and their connection.
It could be a demon who has a grudge against Kagome's father. Maybe her father defeated this demon long ago, and now that Kagome is in the picture, the demon sees it as a chance to get revenge on the family.