When Harry and his friends knocked on Professor Heppe's office door, they heard a steady voice inside saying, "I know, Felix."

The three looked at each other, "It's Principal Dumbledore!"

But when Professor Heppe opened the door, the room was empty, no one was there.

"Professor, was Principal Dumbledore here just now?" Harry couldn't help asking.

Felix smiled, "That was just a message from him, he wasn't here." He stared at the knight doll in Hermione's hand and said hesitantly, "This... How come it's with you?"

He was not sure if the three knew anything, and he complained in his heart, Sirius, you are too lame.

Fortunately, the following conversation made him realize that they did not find Sirius, but only sent him the magic puppet that he accidentally "lost". Hermione apologized for her naughty big cat, "Crookshanks may have treated it as a toy, we cleaned it before we came here..." Felix

stared at the knight doll, its scarlet eyes flashing, sitting on a coaster, the back looked a little lonely.

"...Thank you."

After finishing the business, Harry took out the nameless book from his pocket, "Professor Happ, I have already chosen it, which is Apparition."

Felix did not rush to refuse, but looked at him steadily: "Do you understand the risks of this magic?"

Harry nodded.

"Do you know how to solve the problem of separation?"

Harry was speechless this time. He looked at Hermione for help. Hermione once again lived up to everyone's expectations: "Minor separation can be treated with distilled water, preferably distilled water essence. If it is a more serious separation, such as the separation of the head and the body..."

Harry looked at her in horror, but she continued to introduce seriously: "This situation requires professional handling. The information I found was from the Ministry of Magic's Incident Group."

Ron added: "There are also fines. I mean, if the Ministry of Magic finds out that you don't have a certificate and you get into trouble, you will be fined a lot of money."

Felix nodded slightly and said approvingly: "That's about it, So, Harry, you still insist on choosing Apparition?"

Harry said stiffly, "Yes, yes, Professor."

Felix looked at him, "Don't worry, I have another question for you to answer: After you know this information, what do you think is the most important preparation for practicing this magic?"

Harry opened his mouth, "Uh... prepare the white mulberry essence?"

Felix laughed dumbly, "This is the most basic. If not, I would suspect that you have troll blood. Think about it again!"

Harry frowned and racked his brains. Ron and Hermione were also thinking hard. Hermione's eyes lit up, raised her hand and looked at Felix. Felix shook his head at her, and she put her hand down with some regret.

"I guess... you need someone to guide you?"

"It's very close, Harry."

Another minute passed, "I know! When practicing Apparition, there must be someone watching beside you to avoid no one to rescue you when you are seriously split!"

Felix smiled, "That's right, the most serious problem with Apparition is splitting. In the past century, there have been 21 recorded deaths, all of which were caused by serious splitting when trying to Apparition privately, and being nailed to the spot, and no one knew..."

"The result was that they watched themselves bleed to death in regret."

Harry shuddered fiercely. How could the professor say such a terrifying thing with a smile? The key is that it is too vivid. He is worried that the next time he faces a Boggart, the object of fear will become his split self.

"So," Felix turned his head and looked at Ron and Hermione, "you will supervise Harry and prevent him from doing anything wrong, right?"

Ron and Hermione nodded repeatedly. They were also scared of the serious consequences.

"Very good, let me tell you about my plan." Felix said to Harry, "First, you need to master the theoretical knowledge of this magic. I need you to write a paper on Apparition."

He pointed his finger at the nameless book, and a bright silver light appeared on his fingertips. Various pictures began to appear on the pages of the nameless book. They saw the figures of Professor Hepp disappearing one by one, and then suddenly reappearing.

"This book can help you, Harry. I set some restrictions, and you need to crack them layer by layer. It's very simple, just like playing a game. By the way, do you know what a game is?"

"Is it a TV controller game? It was included in Dudley's birthday gift a few years ago." Harry said. He saw it when his cousin Dudley opened his birthday gift and envied him.

But Dudley treasured it for a few days, and Harry found a button on the controller in the trash can.

"Well, it's a bit like a game level."

Felix continued, "The thesis and breaking the restrictions are the first step you have to complete. The second step is practice. I will train you a few times until you have a preliminary grasp of this magic."

"After that, you have to work hard on your own. Don't act rashly. Make sure someone is by your side every time you practice. Do you understand?" He looked at Harry seriously.

Harry nodded in agreement hurriedly, and he felt relieved. After listening to the professor, he had a clear idea of ​​what to do next.

"Professor, are we going to practice in the Forbidden Forest?" he asked, "I heard that you can't Apparate in Hogwarts. They have been, uh, applied an anti-Apparition spell."

Hermione nodded in agreement.

"No," Felix denied this statement, "There is a place that can circumvent this restriction."

Seeing that they wanted to ask more questions, he clapped his hands, "Okay, little guys, you will know when the time comes."

Finally, Harry also tentatively asked about Professor Lupin's situation and was told that everything was normal.

When they came out of the office, Ron muttered, "We are not young anymore. In half a month, I will be fourteen years old."

Harry said regretfully, "I still have nearly half a year." He said teasingly, "Ron, are you reminding us not to forget to prepare birthday presents?"

Ron blushed and chased Harry, trying to hold Harry's head with his armpits. Harry ran away laughing.

...

In the office, Sirius, who had transformed again, sat on the sofa and said sullenly, "Harry is too young. You shouldn't teach him this magic. You should be more careful."

Felix looked at him with interest, "I am really surprised that you know the word 'caution'."

Sirius looked at him in exasperation and heard Felix continue, "Did you know that Harry is learning the Patronus Charm from Lupin?"

"What?" he asked in astonishment, "The spell to resist Dementors?"

Felix let a bottle of butter beer float in front of him, and Sirius drank it in big gulps, "I miss it so much... It makes me want to cry. Life is still pretty good."

"You don't object?"

Sirius leaned against the back of the sofa and said lazily, "In fact, you have thought it through very carefully, at least more carefully than me. I just thought about it. If it were me, I would either refuse or take him to practice immediately."

"Knock knock!"

There was a knock on the door outside. Sirius choked on the beer in his mouth. He looked at Felix nervously and mouthed, "Make me smaller!" He looked at the candy on the table. He had just eaten a piece. He didn't know if it was his helmet or upper body armor. Anyway, the knight's sword had already entered his stomach.

"Professor Happ, it's me, Lupin." The voice outside the door said.

Felix looked at Sirius teasingly. Sirius walked to the door with a dark face. "Hey, Hep?" He pulled Lupin into the house.

"Padfoot..." Lupin was stunned for a moment, then hugged Sirius and whispered, "Forgive me for misunderstanding you."

"Oh, Moony, please forgive me too..."

"Bear~!"

The two looked up and saw Felix fiddling with his wand, making a fire in the fireplace. "The temporary Floo network line, if you have anything to say, go there to talk. If Harry makes a surprise attack, Professor Happ's news of harboring a serious criminal will be exposed."

Sirius grabbed a handful of Floo powder and muttered, "You are jealous..." The next second, he was thrown into the fireplace, "You! #￥@%... Number 12 Grimmauld Place!"

Half an hour later, Felix and Lupin returned from the fireplace, and Lupin said gratefully, "Thank you for everything you have done, Professor Happ."

"You're welcome, I was also entrusted by someone."

Before leaving, Lupin couldn't help asking him, "When did you know I was a werewolf?"

"Why do you ask?"

"You weren't surprised when I said I was a werewolf. If you couldn't guess, then I'd be too stupid." Lupin said self-deprecatingly.

"It doesn't matter. So far, you've been a good colleague."

After Lupin left, Felix sat on the sofa and said with emotion: "Long weekend... Well," he pulled out his wand, and a swift patronus flew out from the tip of the wand, "Go."

After a while ,

he whispered: "Severus, eh, is your patronus a doe?"

After a pause, he muttered: "Oh, this is a bit hurtful... I actually want to ask, do you want to have a drink together?"