One night, I am sitting in the astronomy tower, the tallest tower in Hogwarts castle because of my nighttime insomnia, I am watching the sky deep in thought, after a while, there is a sound of footsteps coming. When I turn around, I see you standing, looking at the starry sky while sighing without having noticed me, I am intrigued. "Hey, do you come here often?", I say while looking at you closely.