Perhaps there could be a stack of old, hand - written notes. These notes might contain his personal thoughts on magic, or his memories related to certain spells and potions. Snape is a very private person in the original stories, so these notes could be full of secrets. For example, they could be about his past relationships or his early experiments with magic that he doesn't want others to know about.
Some fanfictions might suggest that there are hidden portraits under his desk. These portraits could be of his family members or people he once knew and cared about. They could be whispering advice or secrets to him when no one else is around.
Well, it could be about Harry finding a hidden magical object under Snape's desk. Maybe it's a potion ingredient that Snape has been secretly guarding. Harry, being curious, decides to investigate further and gets into all sorts of trouble as a result.
Obviously, Harry Potter would be one of the main characters. He's the one who is likely to be under Snape's desk for some reason. And of course, Snape himself. His desk is the central location, so he has to be involved. Also, Hermione might be there. She often helps Harry out, and if Harry gets into trouble under Snape's desk, she could be the one to figure out a solution.
One possibility is that this is a misnomer or a very tongue - in - cheek title. In the fanfiction, it could be that Harry is using some new form of magic under Snape's desk that has an effect that can be humorously described as'sucking'. For instance, he could be using a spell to draw out negative magical energy that has accumulated under Snape's desk, which is causing problems in the classroom, and the spell's action makes it seem like he's'sucking' something out.
Snape would probably be very conflicted. On one hand, he has a long - standing grudge against James Potter, Harry's father. But on the other hand, he loved Harry's mother, Lily. So, he might be cold at first, but then his sense of protecting Lily's son could kick in. He would likely be very strict with Harry, as he is with all his students, but also secretly keep an eye on him to make sure he's safe.
I'd say it's quite creative in a rather odd way. The combination of characters and the strange situation described makes it stand out. It immediately grabs your attention, even if it might be a bit difficult to understand exactly what it means at first.
It's possible to discover notes, sketches, or even a secret message someone left. Maybe a folded-up letter or a doodle on a piece of paper.
It could be a cartoon of superheroes or maybe some popular anime characters.
Well, in a fanfiction scenario where Snape finds crying Harry, there are so many possibilities. Snape could be secretly pleased that Harry is showing vulnerability, as he has always seen Harry as James Potter's son. But on the other hand, he might also feel a twinge of guilt for how he's treated Harry. The encounter could spark a whole new storyline. For example, Snape could start to protect Harry more secretly, or he could use this as an opportunity to finally have an honest conversation with Harry about their complicated past and present situation.
Perhaps in the fanfiction, Snape finds Harry lost in the Forbidden Forest. Snape, being a master of potions and having knowledge of the forest's secrets, takes Harry under his wing. This could then explore a different dynamic between them, where Harry starts to see Snape in a new light and Snape has to confront his past actions and grudges. It might also involve Snape teaching Harry some advanced magic that Dumbledore had not yet introduced to him.