Hogwarts: I rely on MC to pretend to be an alchemy professor

To put it bluntly, Sirius was not considered particularly reliable in the eyes of most adults in the wizarding world. Of course, this was a common problem among Gryffindors.

The difference is that after the Gryffindors get married and have a family, or after being beaten up by society, they will gradually restrain their own eccentricity and edge, like the ordinary Weasleys, ordinary Lupin, but not Sirius.

Although he was indeed beaten up, it was mainly by the Dementors in Azkaban, and not the intrigues and all kinds of frustrating interpersonal relationships in the so-called adult society. As a result, his experiences were more than one, but he did not appear very mature. Basically, he was still the same as he was before he was imprisoned in Azkaban.

This is also the reason why Mr. and Mrs. Weasley were not very willing to let Ron go to Sirius's house. It was not for any trivial reason, but simply because they were afraid that Sirius's good ideas would cost the lives of several young wizards.

If Harry hadn't really been unwilling, they would have even wanted to snatch Harry's custody from Sirius, but unfortunately, they couldn't, because whether in the Muggle world or the wizarding world (of course the wizarding world has Dumbledore's endorsement), in short, in both worlds, Harry's custody was firmly held by the Dursleys, although they were not so willing... at least it seemed so.

The other two families did not have as much inner drama as the Weasley family. Although Neville's parents knew Sirius's character, after all, they had worked together in the Order of the Phoenix and were classmates. What's more, Sirius had cleared his grievances not long ago, so his character was guaranteed.

Well, it has nothing to do with personality.

They had the same idea as everyone else, that is, although they did not think Sirius was very reliable, they had a full understanding of Sirius's magical strength. It could be said that if Sirius's fighting will was fully brought into play, in a purely one-on-one situation without a sneak attack from behind, even Voldemort could rush up with his wand in hand and fight him off.

Of course...it's just two moves...to be exaggerated, no more than ten moves.

And Hermione's parents... unfortunately, this is the importance of information asymmetry. At least if Hermione's parents had time to subscribe to the Daily Prophet, they would not have been able to distinguish between Sirius and the fugitive criminal Sirius with just a few words from Hermione.

Hermione didn't know what lies she used to deceive the two logical middle-class people, and she and her friends came to the house that Sirius bought on Privet Drive.

"Seriously, I suddenly want to invent a spell that can only destroy the decoration of a house without destroying the house itself... I'm a little tired of dismantling these now..." Sirius swung a hammer and violently smashed a big hole in the stainless steel cabinet that did not meet his aesthetic standards.

"Can't the skinning curse be used on this? I remember those spells are more idealistic." Kaisen complained while using the mechanical arm behind him to frantically destroy all objects that were not the main body of the house and were not living things.

"I... um... I didn't think much of household magic when I was in school, so I didn't learn much." Sirius said, looking at the little wizards, and Ron looked at them: "You should look at Hermione."

Hermione sighed helplessly: "It's too late to use the Flaying Curse now. The wallpaper and furniture have been smashed into pieces... I can only use a Flaying Curse on each piece."

"Maybe it's because I'm not idealistic enough. In fact, those spells don't have a standard casting effect. The so-called magic is actually more about doing whatever you want." Sirius explained.

"So you can't skin someone with just magic, without any spells?" Neville asked curiously.

"Um... oranges are fine."

A simple house demolition plan took the whole morning to complete with the full efforts of two adults and three little wizards. At noon, they ordered some fast food and started to eat. Perhaps because they were so hungry, Kaisen took out his mobile phone and ordered a second time ten minutes later.

"By the way...didn't you guys have any breakfast before you came here this morning?" Sirius asked.

Neville showed an embarrassed expression: "There's nothing we can do. We thought the decoration was complete. We came here just to eat, and we even saved some space..."

Ron nodded listlessly: "Yeah, now I know what my mother's expression was when I left."

Sirius asked subconsciously: "What expression?"

"Uh... pity, maybe because you're unreliable?" Ron said.

"Yeah. My parents have the same expression." After Neville finished speaking, he looked at Ron and clapped his hands in tacit understanding.

After eating and drinking, Kaisen sat on a toolbox to rest for a while. Suddenly, scaffolding and gauze appeared in his hands. He walked out staggeringly and surrounded the whole house tightly.

By the afternoon, when the young wizards had eaten and rested enough and all left the factory in the best health, Kaisen finally started his official work.

He first asked Sirius to use the Vanishing Charm to collect the garbage in the room, and then started with the floor. The square oak planks were quickly laid out on the two floors of the house like building blocks, and then the wallpaper...

"...............What's wrong?" Sirius asked Kaisen who suddenly paused.

The latter shook his head. He couldn't say that he forgot to bring putty. Pasting the wallpaper directly would make it look uneven. However, as a genius civil engineering senior, he thought of a solution almost instantly.

First, he took out a huge thin wooden board and stood it up so that it was basically the same height and width as the entire wall. Then he spread three pieces of paper rolled up from sugarcane on the board and slapped the board and paper directly on the wall.

"I'm such a fucking genius!" Kaisen gave himself the praise without hesitation.

Then he followed the same method to cover the other walls with wallpaper. When he left, he took out a lot of paints of various colors and gave them to the little wizards: "Paint some patterns on the wallpaper, floral, plant or animal patterns, you have to paint them all, don't be lazy."

Hermione nodded subconsciously, and then she realized what was happening and found Sirius to ask about the wall area of ​​the house...

"Oh... in terms of wall area, it's probably... more than a thousand square meters."