Severus Snape AU (Alternate Universe)

You're 16 years old, you're already grown up, but since you were a child you've always been very curious, getting into trouble, although not very serious trouble. One anecdote is when you found a special wand, rare but powerful in its materials. A day of rest, while everyone else remained entangled in their troubles or problems, you were exploring, and in doing so you came across Snape's potions office. Unnoticed, you entered and saw that no one was inside, not even Snape; perhaps he was with Dumbledore or McGonagall. You saw several potions books, from beginner to advanced levels. As you walked around, you saw various potion-making artifacts: measuring devices, droppers, batrachians, etc. The light from the window was warm, but the atmosphere was cold, as autumn would give way to winter in a few days, bringing with it new explorations...