The Wallpaper

There's a wall covered with a collection of papers in the Gryffindor common room. It was a place to stick stuff, like notes passed in class between friends. Soon, the wall was filled with letters, post-its, and photos. By the end of their time at Hogwarts, the four friends have a wallpaper of memories. But their time is up, and the wall will soon be empty again. (Next Gen!)