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This post is about the Tom x Severus ship.
It's not precisely a popular ship, so that's your first warning.
Your second warning is that they are so ooc that they can be considered different characters altogether.
That said, i've had this story idea in my head for a while, that I will probably never write but anyways...
I was thinking about the typical time-travel fanfic where Severus dies in the battle of Hogwarts and wakes up in the past. He goes back to a point in time in which he is still a child, way before Hogwarts. I was thinking it could be at a moment where he had showed accidental magic already, so Tobias was already an asshole and Eileen was already in her way to Depressionland. But, since part of his mind is still that of an adult and he retained his knowledge of his previous life, he is able to control his magic, so once he is back, he never had anymore bouts of magic.
He goes to muggle school. When he gets his Hogwarts' letter he is alone, so he writes a rejection letter and burns the one he got. His parents know nothing and life keeps going.
He graduates from high school and goes to college. I was thinking on a Chemistry mayor, what do you think?
He's been brewing since before getting his Hogwarts letter, under a pseudonym and selling his experiments on Knockturn. He got part-time jobs. He has enough money and by the time he starts college he moves to London.
Life is good, tranquil, he has friends and does what he likes.
One day he's coming back from classes and finds Dumbledore waiting for him at the door of his own fucking apartment.
He goes, pretending he doesn't know who the old man is, planning on telling him to go away. He is about to do it when the Dark Lord appears behind him.
Next thing he knows, Dumbledores is appareting the three of them to his office at Hogwarts where a mixture of the Order and some death-eathers is waiting for them.
Now, Severus pretty much cut all ties with the Wizarding World. Aside from his dealing in Knockturn he is not really aware of anything there and has no idea of the current political climate. So, he doesn't know about Grindelwald coming back.
That surprise is coupled with a, not totally recovered, but mostly sickly-looking human form of the Dark Lord.
Now, this is the part where I can't decide. I have, so far, come up with three possibilities:
1. Severus literally tells them everything. Well... mostly.
He tells them he is from the past and is reliving his life. He tells them he used to be a death-eather but then he became a spy. He tells them how he died.
Lastly, he tells them not to bother him.
He goes home, and finds his apartment was a mess. Someone forced their way into it. He hears screaming on the floor above his own and finds some of Grindelwald men attacking his neighbors.
He kills two and takes one to Hogwarts for interrogation. He will help Dumbledore and Voldemort. Apparently there is no option. Fuck.
2. Is the same, except that Severus tells them nothing about his coming from the future.
And then, some time into actively helping Dumbledore and Voldemort fight, he finds out Tom is also from the future.
Fair warning: It's awkward.
3. Into the first half an hour of being in the headmaster's office, Tom says or does something that makes Severus realize Tom is also from the future.
Severus practically freezes for a good minute before glaring at Tom. Then Severus says something that he very well knows will tell Tom when Severus is from.
And Tom looks at Severus with what could only be discrabed as terror.
Severus then punches Tom in the face, hard. He may had broken the man's nose. A second later, he takes the other flying to Merlin knows where to have a conversation.
No need to say it but, Sev is mad.
From here, everyone else can conclude that the two of them already knew each other. This, coupled with future interactions that show Severus' lack of fear of Tom and Tom's apparent hesitation, leads everyone to the conclusion that Severus was Tom's ex. They tried to deny it with varying degrees of success.
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So? What wpuld be better?