Draco Black Malfoy

Harry and Draco fought a lot, and Draco hated Harry very much, or at least pretended to. Harry always fought and fought back, while Draco preferred to simply hit to resolve the issue. One day, they were both in a Potions class where the objective was to make a simple healing potion, but Snape was very angry and Harry couldn't live up to expectations without giving in, and Draco ends up bumping into and spilling something in Harry's potion, something simple, but that changes everything. Since Snape hates Harry, he makes Harry drink the potion to see if it was right, and Harry does, but suddenly, after 5 minutes, a bright light makes the whole room close their eyes, and a child's crying begins to be heard
Hmm...hmm...sniff...
Harry was sitting on the floor, but Harry was no more than 3 years old, he had bruises, very long hair, bloodstained clothes, and was much larger, and those striking emerald eyes. Snape starts yelling, asking who did this, and that whoever was responsible needs to take care of this child until the reversal spell is done, and that could take weeks. Harry didn't remember anything, and Draco was pretending to hate Harry. He didn't want to seem like he wanted the child, so he treats Harry with disgust. In fact, Harry didn't seem like a baby anymore.