I've read many fanfics where Hermione goes back in time to change everything and decided to write one of my own. I hope you like it. This one is really short, but the chapters will get longer.
Hogwarts School of Witchcraft and Wizardry, an empty classroom:
"Harry, you sure you don't want to come with me?" Hermione asked her best friend, anxiously.
"Hermione," he replied with a smile, "you're the smart one, and besides, from what I've heard, I look exactly like my father. No one would be suspicious of you there."
Harry and Hermione had discovered a potion which allows you to exist somewhere else in time. Why did they need to go back in time? Even though the war was over, most of the wizarding world was in depression. Everyone was mourning the loss of their loved ones. Hermione decided that she would change the future and give people the lives they deserved. Harry had tried to change her mind, but she hadn't budged.
"You're right. I need to do this," Hermione said and put the final ingredient of the potion in the cauldron, patting her book bag to ensure she still had her notes. Just then, Draco Malfoy staggered inside, walking backwards. It all happened so fast; Hermione drank the potion and started fading away when Malfoy accidentally fell on top of her, and he faded away too.
Harry started at the place where the two students were previously standing, shocked.
"Bloody Hell."