It's very rare and out of the ordinary. The typical dynamics and character traits in the official storyline make this kiss scenario in the fanfiction quite a shock and a stretch of imagination.
This plot is highly unconventional. In the Harry Potter series, there's no such indication or possibility of Snape and Hermione having a romantic connection. So, this fanfiction takes a bold and unexpected creative turn.
Yes, there are some. However, this pairing is quite controversial among 'Harry Potter' fans as it goes against the canon relationships in the original series. Some fanfictions might explore an alternate universe where such an unexpected relationship could develop, often with creative plot twists and character developments.
One way it could be justified is through a magical bond or prophecy. Maybe there's a hidden prophecy that states their union is necessary for the greater good. For example, it could be related to the balance of magic in the wizarding world.
One possible plot could be a time - travel scenario. Hermione travels back in time and ends up in Snape's student days. They initially clash but gradually develop an understanding, which culminates in a kiss. Another could be a situation where they are both working on a dangerous magical experiment and in a moment of high tension and shared vulnerability, Snape kisses Hermione.
Well, it could start with a medical emergency for Hermione that brings her to Snape's doorstep. From there, their interactions could reveal hidden aspects of their characters and build a complex relationship. Maybe there's a mystery illness or a series of challenging cases that they have to solve together.
Hermione might be shocked at first. She has always seen Draco as an adversary, so a neck kiss from him would be completely unexpected. She could push him away immediately and demand an explanation.
Often, it starts with the slapping incident which creates immediate conflict. Then, Hermione might be outraged and seek justice or revenge, which drives the plot forward. For example, she could go to Dumbledore about it.
Snape might initially be shocked. He's not one to show much emotion openly, but internally he could be very disturbed. He might start investigating what happened to Hermione immediately, using his skills in potions and magic to try and find a cure or at least understand the cause.
Hermione might become more guarded at first. She is used to being independent and suddenly being 'gifted' to Snape is a big change. But over time, she could learn to be more patient and understanding. Snape, on the other hand, might soften a bit. His usual cold exterior could crack as he gets to know Hermione better.
She might initially be shocked and scared. But then she would start to think rationally and try to find a way to outwit Snape. For example, she could start to gather evidence against Snape's own wrongdoings, if there are any, so that she can turn the tables on him.
She might give him cold stares in class. Hermione is not one to shy away from showing her emotions through her expressions. So, every time Snape is in her line of sight, she could fix him with a withering glare that clearly shows her displeasure.