Dumbledore? He knows nothing about MC alchemy.

"That's what I thought, what about you?"

"Call Severus over and have him drink two bottles of Veritaserum first!" said Kaisen.

"Um...actually one or two drops are enough. Aren't you curious? He escaped from Azkaban with so much hardship, but instead of returning to the Black house, he appeared in Hogwarts, your office?" Dumbledore asked, his hands crossed on the desk, supporting his chin.

"He may have wanted to go back, but was accidentally picked up by the drunk Lupin and I." Kaisen said with a blush.

"Then why did he stay? If he wanted to leave he would have left already."

"...............Do you think he has hostility towards Harry?" Kaisen asked back.

"If there was any hostility, Harry and his friends would have died countless times. A wizard like Sirius is not someone a few young wizards can contend with even without a wand," Dumbledore explained.

"So what's the reason... to protect Harry? Or is there some other enemy of his here?" Kaisen murmured, and then he suddenly realized: "I think I know what's going on!"

Chapter 185 A Little Talent

"What did you think of?" Dumbledore asked curiously.

"When Lupin and I were exploring before, Lupin told me a little-known fact about werewolves: werewolves will not attack wild beasts unless they are hungry. Lupin also knew about Sirius's Animagus form, which means that Lupin and Sirius had a very good relationship back then." Kaisen said in a series.

Dumbledore nodded in satisfaction and said, "Go on."

"So Sirius may have learned Animagus to keep Lupin company and not be too lonely in werewolf form. Then, was Sirius Lupin's only good friend at the time? I'm asking this because I don't know much about their past."

Dumbledore nodded. "Back then, the four of them were very good friends. You already know Lupin and Sirius. The other two were James Potter, Harry's father, and Peter Pettigrew, who died."

"That's right. Sirius should have been more than the only one learning Animagus at that time. Although I don't know the three of them, I understand the thoughts of young wizards of their age. They would never lag behind others in anything, so the other two should have also learned Animagus." Kaisen whispered.

"Why are you so serious about this? James Potter and Peter Pettigrew have been dead for a long time." Dumbledore said quietly.

"How they died."

"James Potter was found and killed by Voldemort at home, and Peter Pettigrew was found and killed by Sirius on the Muggle street. Sirius was sent to Azkaban because of this incident." Dumbledore responded.

"Why did Sirius kill Peter Pettigrew, who was his friend?"

Dumbledore stood up from his seat and began to walk around the office. "I cast a protective spell on Harry's home at that time, and that spell needed a secret keeper for it to be effective. As long as the secret keeper didn't betray him, Voldemort would never be able to find the whereabouts of Harry's family."

"Let me guess, the secret-keeper is Sirius?" asked Kaysen.

"I think so too... but the truth might be different. I wanted to be the Secret-Keeper at first, but James Potter, Harry's father, refused. He said he wanted Sirius to be the Secret-Keeper. But if Sirius really was the Secret-Keeper... it doesn't explain why he killed Peter Pettigrew in such a cruel way. A Killing Curse would have been enough."

"What you mean by cruel is..."

"Peter Pettigrew was blown to pieces, leaving only three fingers."

Kaisen touched his chin and said, "If it was Sirius... Yes, if Sirius was a traitor, he wouldn't have to use such cruel methods against Peter Pettigrew. It's completely unnecessary, except for the hatred between him and Peter Pettigrew for Megatron."

"That's what I wanted to say." Dumbledore nodded.

"Are you trying to say that the real traitor is Peter Pettigrew, and the real secret-keeper is also Peter Pettigrew?" asked Kaisen.

"I'm afraid so."

"It would be fine if that weren't the case. If that were the case, then Sirius would be a war hero, and you let him stay in Azkaban for so long... I despise you." Kaisen raised his middle finger.

"That would give him peace of mind."

"Haha, wait a minute, I'll go find Lupin and ask him what's going on. After all, he's the person involved."

"Don't, although it's not nice to say this, but at the time, Voldemort's actions favored werewolves. So, at that time, James Potter and others didn't particularly trust Lupin, which was one of the reasons why he didn't become a candidate for the Secret Keeper."

"so?"

"This is a sad memory for him, don't tell him about it," Dumbledore explained.

Kaisen shook his head. "So, more than a decade ago, his best friends discussed things without him. And now, more than a decade later, even though I'm not necessarily his best friend, I'm still doing the same thing as I did more than a decade ago, without him."

"...Then ask him to come here," said Dumbledore.

"to make."

Soon Kaisen took Lupin into the principal's office. After listening to Kaisen's analysis along the way, Lupin already had a general idea of ​​how to push forward the current clues.

"What I know and what I don't know has been mostly deduced by Kaisen, but I can tell you about their Animagus forms. You all know Sirius's. The others are James's Animagus, a deer, and Pettigrew's, a mouse."

Kaisen and Dumbledore nodded: "A little mouse..."

Suddenly, Kaisen suddenly remembered something: "Dumbledore, do you have a newspaper here? The Daily Prophet! The one where the Weasleys won the gold Galleon jackpot!"

Dumbledore waved his hand, and a newspaper floated out from a clip on the bookshelf.

After taking it, Kaisen spread out the photo of the Weasley family in Egypt on the table.

"Lupin, come here and take a look. Is this the little mouse?" Kaisen said, pointing to a little mouse lying on Ron.

Lupin leaned forward, as if he couldn't accept it. He couldn't accept that his brother, whom he had misunderstood for over a decade, might have been framed. He also couldn't accept that his other good friend might be the real traitor, and had even faked his death for so many years. But in the end, he just nodded helplessly: "..................Yes."

"But his fingers..."

Dumbledore reminded him, "Remember those fingers of Peter Pettigrew that were left... They just matched up."

"Now everything almost fits together. Sirius came to Hogwarts just to find Peter Pettigrew and kill him... I was wondering why he was holding Ron like a perverted dog... I see..."

Kaisen then remembered that Sirius had suddenly hugged Ron and was almost biting him. He was puzzled at the time. Sirius usually liked Harry the most, so why did he suddenly hug Ron that time? It turned out to be because of that Peter Pettigrew...

"Did you solve the problem so perfectly? It seems that people who can be neighbors with detectives have to be quite capable." Lupin looked at Kaisen and said.

"Although I can't compare with that pervert, I do have some talent." Kaisen said with a smile.

"What about Sirius and Peter Pettigrew now?" Lupin asked.

Detective Kaisen? The drawing is a bit abstract, with a lollipop in his mouth and a request for a gift.

Chapter 186 Diluted

"After pinning Sirius down, ask Severus to give him some Veritaserum. On the other hand, ask the Hogwarts professors to send him warmth, check the water meter in Gryffindor Tower, capture Peter Pettigrew, give him some Veritaserum as well, and then the truth will be revealed." Kaisen said as a matter of course.

"My idea is... to hold back," Dumbledore said with a smile.

"Hmm?" Kaisen and Lupin both looked at Dumbledore: "What are you up to?"

Dumbledore pulled a letter from under his desk. "Look at this."

After taking the letter, Kaisen tore open the envelope and looked at the contents. The content was easy to understand. Peter Pettigrew wrote to the headmaster of Durmstrang asking him to come to Hogwarts to save him.

"...So any letters we professors and students write to Hogwarts will be monitored by you?"

"Those of you who are recorded by Hogwarts certainly won't, but if the detection magic in the Owlery encounters an unfamiliar face or an expired face, then a backup of the letter will be needed," Dumbledore explained.

"The headmaster of Durmstrang is Karkaroff...will he really come?" Lupin asked.

"It's hard to say. Peter Pettigrew didn't say any threatening words in the letter. From this, we can see that there is at least something that Karkaroff has not cleared himself of but is known to the Death Eaters themselves." Dumbledore shook his head.

"You have to be so high and mighty as to try to bring Karkaroff down from his horse from Merlin's perspective," Kaisen said calmly.

"Next year will be the Triwizard Tournament. The headmaster of Durmstrang will be staying on the grounds of Hogwarts for most of the semester. I think this is necessary," Dumbledore nodded.

"Wow, you finally did what a principal should do." Kaisen praised, but the tone of praise always gave people a sarcastic feeling.

Dumbledore looked at Kaisen helplessly and said, "Until now, I still don't know what image I have in your mind."

"You can take a guess." Kaisen nudged Lupin with his arm after he finished speaking. "Do you know the Animagus counter-curse?"

Lupin nodded.

"That's fine. Let's go back to my office and ask Severus to get some Veritaserum for Sirius."

"what?"

Kaisen spread his hands and said, "That's right. Our previous reasoning, no matter how logically consistent it was, was just inference and cannot be used as evidence. Real life can sometimes be much more outrageous than fiction."

"If the events in your novel don't follow logic, readers will curse you. But when real life doesn't follow logic, we just have to accept it. What if the truth is completely different from our reasoning?"

Dumbledore fed his phoenix Fawkes and sent him to deliver a letter to Snape: "Kasen is right. We should always maintain the most basic humility."

Soon Snape knocked on the door of the headmaster's office and walked in without waiting for Dumbledore to speak. He ignored Lupin and looked at Kaisen and Dumbledore: "What's the matter?"

"We found traces of Sirius."

"Where is it?" Snape, who was a cold uncle just a second ago, had already taken out his wand and asked murderously.

"In my office." Kaisen raised his hand awkwardly.

Snape nodded, then cast a flying spell at zero frame and instantly flew out the window in a puff of black smoke. Seeing this, Kaisen and Dumbledore immediately used their own methods to return to the alchemy office.

Lupin was the only one left in the principal's office, and he could only look helplessly at Fawkes on the bird stand.

Fox shrugged helplessly and flapped his wings towards Lupin.

"Thank you so much, you are the most beautiful phoenix I have ever seen."

Soon Snape came in directly from the ventilation window in the corner of the alchemy office, saw the people in the woods inside the office, and flew directly towards there.

Then......

"Kaysen...why is your tree square?" asked Snape.

"...It's convenient to make wooden boards." Kaisen replied dryly.

"Oh...where is Sirius?" Snape nodded and asked.

Kaisen pointed at Sirius, who was still sleeping like a dead dog. He looked at Lupin, and Lupin looked at him.

Finally, it was Dumbledore who broke the silence: "Well, Kaisen doesn't know shit about spells." As he said that, he hit the big black dog on the ground with an Animagus counter-curse.

The next moment, Snape saw his long-awaited enemy, Sirius Black, but Snape was still very rational. He just pointed his wand at him and cast a resurrection spell.

Sirius woke up slowly, saw Snape in the dim light, and subconsciously barked, which made Snape smile strangely.

"Have you forgotten the human language?"

Sirius's expression froze for a moment when he heard Snape's sarcasm. Then he lowered his head and saw his old clothes and his human hands.

He looked at the other people around him, Lupin, Dumbledore, and Kayson: "My Merlin..."

"Sirius, we have some very important questions for you," Dumbledore said with a light cough.

Sirius just breathed a sigh of relief: "This is a good opportunity for me to tell you everything. Is there anything you want to ask?"

"I'm sorry, Mr. Prisoner of Azkaban, you can't use your tongue and mind freely now. Drink this." Snape took out a potion bottle from his pocket and threw it over.