After leaving the Headmaster's Office, Su Er wandered around the Castle all afternoon and only returned to his dormitory after dinner.
After responding to his friends' concern, he lay down on his bed without undressing.
The next moment, he appeared in that mysterious white space. It had changed dramatically. Many transparent bubbles floated in the translucent space, with light and shadow flowing inside them. Looking closely, he could see the outside world.
Just as he had done before, Su Er extended a finger and recited the incantation.
"Expecto Patronum!"
This time, he would not fall unconscious again.
Or rather, in the short time before waking up, he had already figured out what had happened, though it truly exceeded his imagination-or rather, what had happened was simply too absurd.
Su Er could offer no explanation for it. He could only put it down to the wonders of magic, perhaps?
The silver threads unique to the Patronus Charm drifted through the white space. Su Er felt his magical power drop sharply, and then the silver threads gathered, forming his own Patronus-a badger.
Then it began to dissolve and gather again, tracing the outline of a human figure.
A girl wearing a silver bracelet on her wrist appeared.
"So this is what Hogwarts Castle looks like. It's just as I imagined, Su Er." The girl smiled at the boy before her.
"Yes. What I told you before couldn't really compare with seeing it yourself. Seeing is believing, after all..."
"Ariana." Su Er smiled at the girl too.
"I never imagined a scene like today's, that I would still be able to see my brother. After all these years, he's already an old man," Ariana said softly.
Indeed, the girl who appeared through the Patronus Charm was the girl Su Er had met in