One possible plotline could be a time - travel or alternate - reality scenario. For example, in an alternate universe where the relationships between characters are different, Snape and Hermione could have a relationship that leads to her getting pregnant. The story could then focus on how they deal with the consequences in that different world, perhaps facing opposition from others due to their age or social differences within the wizarding community.
Maybe it could involve a magical accident. A spell gone wrong during one of their interactions could result in Hermione becoming pregnant. This would then lead to a story of them having to figure out how to reverse the spell or deal with the situation in a way that doesn't completely disrupt their lives. They might have to work together secretly to find a solution while also hiding the situation from others in Hogwarts.
One possible plotline could be a magical accident that results in an unexpected situation similar to mpreg, but rather than focusing on the physical aspect, it could be more about the emotional and social implications for Snape and Black within the wizarding community. How they deal with the stares, the rumors, and the support or lack thereof from their friends.
One interpretation could be that Snape wants to taste a potion Hermione has made. In the wizarding world, potions are a big part of magic, and Snape is known for his expertise in potions. So, if Hermione creates a new and innovative potion, Snape might be eager to taste it to evaluate its quality and effects.
Maybe Hermione is injured while exploring some dangerous magical ruins. Snape is the only one around with the knowledge and power to heal her. As he heals her, they start to have deep conversations about magic, life, and their respective pasts, which in turn builds a connection between them.
Perhaps in a plot where there's a time - travel twist. Hermione is sent back in time and some ancient magic forces her to touch Snape as a way to set off a chain of events that will change the future of Hogwarts. It could also be that a magical artifact has some sort of hold over Hermione and compels her to touch Snape, and through this, she discovers some long - hidden secrets about Hogwarts or Snape himself.
One possible plotline could be Batgirl dealing with her pregnancy while still trying to protect the city. She might have to balance her new physical state with her crime - fighting duties, and rely more on her allies.
One possible plotline could be Naruto is in a foreign land as part of a diplomatic mission. He is offered a traditional drink, and there is a character who smokes a pipe as a cultural thing, and Naruto has to deal with the smell. This shows his adaptability.
One possible plotline could be a magical or supernatural occurrence that leads to the pregnancy in a non - sexual way. For example, a spell gone wrong or a unique power interaction.
One possible plotline could be that Hermione discovers a way to time - travel and goes back to Snape's childhood. She decides to raise him in a more positive environment to change his future. Maybe she teaches him about love and friendship from a young age, which alters his personality and his relationship with others at Hogwarts later on.
One possible plotline could be that Hermione is forced to work under Snape in a special project. She initially resists his strict methods but gradually comes to understand his perspective and submits to his more experienced guidance in potions or some other area of magic. For example, Snape might be in charge of a top - secret research project and Hermione, with her brilliant mind, is chosen to assist. Through their interactions, she realizes that his seemingly harsh demands are actually aimed at achieving the best results.
One possible theme could be redemption. Snape is a complex character with a lot of baggage. A fanfiction could explore how a relationship with Hermione might be part of his journey towards redemption. Maybe Hermione sees something in him that others don't and helps him heal from his past traumas.