Everyone had arrived, and at first, they wandered around the room in curiosity.
Clearly, none of the others had ever seen the Room of Requirement before. Every one of them found it wonderfully novel.
Once he confirmed that everyone had arrived, Harry closed the door. The door then vanished, prompting another wave of surprise. For a while, the question everyone asked most was how this room had come to be.
Harry and the others had not originally intended to explain this, but too many people were asking. Harry hesitated a little, then discussed it with Hermione and the others before deciding to give a brief explanation after all.
"This room is a secret chamber," Harry said. "You can only find and open it using a special method. Once you enter, the door outside closes. Unless you know the method, you can't find this place. Umbridge can't discover us here, so we can practice magic without worrying."
"Cool!" Dean Thomas blurted out. The other students nodded as well, agreeing that it was indeed cool.
"It looks like everyone's pretty happy with this place," Harry said with a smile. "In that case, shall we begin?"
"Yes!" "Let's start!" "We can't wait any longer!"
The students called out in a jumble of voices, with the Twins shouting loudest of all.
"Very good. Then, as we agreed earlier, let's discuss the Patronus Charm." Harry grinned.
Another round of wild howling followed. Things were always a little rowdier with Gryffindor students around, especially when they included goofballs like the Twins and Lee Jordan.
"First, let me explain the Patronus Charm. After all, we seem to have a few younger students here." Harry glanced at Colin and Dennis. Their excitement was second only to that of the Twins and Lee Jordan, and they were being particularly