With the anticipation of the students, a figure familiar to Luke walked in, it was Albert.

Dumbledore had placed a number of henchmen around Harry Potter to protect him, such as Harry's neighbour, Mrs. Figg, who, although she did not possess the ability to cast spells, had by some means gained the trust of Harry's obnoxious Aunt Penny.

Aunt Penny occasionally fostered Harry at Mrs Figg's house when there was something going on at home, such as when the three of them needed to go out on a travelling excursion, if it was too long.

It seemed that Albert would fall into the category of being sent by the Ministry of Magic belonging to Harry's security while he was at school, except that a pure-blooded wizard had turned up to teach science, would he be up to the task?

"Hello class, I am your new teacher Albert Harris." Disguising himself as a teacher, Albert had the decency to write his name on the blackboard.

"Perhaps you think that science has nothing to do with your daily lives, that it's a particularly serious, uninteresting, and optional subject, and I'm here to tell you that's wrong!" Albert waved the whip in his left hand while an empty cup appeared in his right. In full view of the crowd, the cup was filled with pure water out of thin air.

Albert flicked it with his hand and another cup of pure water appeared on the right side of his hand as if it had been replicated.

"Alright, now it's two cups of pure water. Do you guys see it clearly?" The students, already dazzled, nodded their heads.

"Now, I want to change one of the cups of pure water. Which cup do you guys want changed?"

Albert winked mischievously, and the students wailed, gesticulating at the two cups of water, their hands did a trick, and the right side of the clear-looking pure water turned into a yellow liquid at a speed visible to the naked eye.

"It's so cool that the new teacher can do magic, what's in that glass?"

"It's a drink, right?"

"No, I think it's oil!"

"It can't be pee...I peed in the pool the other day, and I got caught right away because it was too yellow..."

The students who were mobilised were talking and speculating about their new teacher's intentions.

"Shhh ...... this is just the beginning." Albert shook his right hand and a card appeared in his hand. The students under the podium were all wide-eyed, afraid of missing the moment.

Then Albert took the credit card and covered the oil cup, inverted it over the water, and then pretended to point with a whip, slowly moving the card out of a small slit, the miracle happened, tiny bubbles rose and fell, and the supposedly denser water underneath rose little by little, while the less dense oil sank little by little, until the oil above turned completely into water, and the water underneath turned into oil.

"This is not scientific!"

"It's amazing, I wonder how it works!"

"I want to learn so much."

There were cheers and murmurs. Even the students in the next class couldn't help but come out to explore.

"Okay, please be quiet. Now who can tell me, excluding my magic tricks, what is the principle of this?" Mr Albert pressed his hands down, and at this point the students were completely taken in by his magical tricks and instantly quieted down.

The classroom had just been so noisy again, and now it was so quiet, originally everyone thought it was amazing, but at this moment this phenomenon that contradicted common sense made them unconsciously all put their heads down to avoid eye contact with the teacher.

"No one knows?" Teacher Albert's expression seemed to be a bit disappointed, then he clapped his hands to attract the attention of the others, "But don't worry, as long as I keep on being in this school, sooner or later you guys will be able to figure it out."

"I'll believe the hell out of you, you're being badassed by your big brother." Luke muttered under his breath, "What kind of magic trick is that, it's a silent spell using a wand disguised as a whip, and Albert ignores the law against casting spells in front of muggles just because he's a member of the Ministry of Magic? By the time Harry goes to Hogwarts you'll be long gone from school, what can they understand about my muggle classmates ...."

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After class, some of the younger girls gathered around Albert and followed him out of the classroom, one boy couldn't help but brag to his table about how godly the new science teacher had just been with all those experiments and magic tricks, his table looked at him with a retarded look, "You idiot, I was in this classroom and took his class too."

"Harris, what about this new teacher whose last name is also Harris" Harry couldn't help but ask Luke after class.

Luke nodded and couldn't help but think of his own name again, "Well, he's actually my older brother, speaking of which, when my father first named us he didn't go through the pages of the name book more than once for some reason, and with the exception of my oldest and second oldest brother who were named by my mother, my oldest brother and myself were all names that started with A that he found in the first few pages . ...My mum grumbled at him for that for a long time, and forced him to cross over to the first few pages after having my sister, or I heard she would have been called Alice..."

"Don't sit there, let's go out and play ball" Fleiger invited enthusiastically, it had been on his mind since before this lesson.

On the playground, the trio who were playing shoot-around were surrounded by a couple of large men, "Look what I see! The stinky fish and shrimp have come together." After saying that, they even snatched the basketball from Fleiger's hand.

What a ghost, it was Dali and the others again.

"Desiree, I'm not afraid of you!" Seeing that the basketball was snatched away, Fleiger shouted at Dali in annoyance.

"Haha, Harry will be my first sandbag, and now the second and third sandbags are delivered to my door!" Dali squeezed his small, unsuspecting eyes and excitedly exchanged double fists.

For the first time in his two lives, Luke had encountered schoolyard bullies as a student, but his previous status as a teacher had produced a twinge of unreality in him, stopping him from trying to reprimand them...

However, Luke currently didn't have a wand to rely on to protect himself by means of spell casting, other than utilising the cleansing and illusion spells that came with his equipment, and by itself it was an offence for minors to cast spells and to expose magic in front of muggles.

"Sudden quest: as long as you don't get caught by a few of Derek Dursley's men, you can get the MacLean Alchemy, which helps wizards improve their physique and increase muscle control in their bodies, as a reward."

Obviously, Harry Potter who was used to bullying was more adept at dealing with this kind of situation where the enemy was strong and we were weak, Harry and Fleiger Brown both looked at each other and pulled a hand Luke who was frothing because of the system's sudden quest, "Run!" Harry yelled.

Running away was a routine for Harry, the skinny Fleiger scurried left and right, slipping and sliding, while Luke, who had just received his assignment and had plenty of nutritional growth to develop a stronger physique, also suddenly stood still in the process of running away and gave the nearest pursuer behind him a punch in the nose knocking him to the ground before running towards the teacher's office again.

The overgrown but poorly agile Dali and the others were screaming in annoyance as their downed companion barrelled after them, causing countless grumbles wherever they went.

"If I'm not mistaken, are you guys fighting?"

"Albert's voice, I'm safe." Luke panted and hid behind Albert.

Morkan's wide grin froze on his face before he could stop it. The four Dali's pushed me and bumped into you, not daring to run away, much less come forward.

"Teacher Albert, as you can see, Dali Desiree and the others are bullying me, Harry, and Fleiger, trying to turn us into their sandbags, based on the fact that they're big and tall. We didn't want to get fatally beaten, so we had to run around." Luke immediately and articulately described the events leading up to it, trying to qualify the incident.

"My own brother and his own protector were bullied by a couple of muggle kids right under their noses." Albert pushed down the anger floating in his mind and asked in a hushed voice, "Is that what happened as Mr Harris says?"

Harry and Fleiger nodded their heads desperately, as if that would prove the reliability of Luke's words.

The four Daleks period, nothing could be explained.

Dali put his hands behind his back, refusing to let Albert notice his new boxing gloves.

"Mr Desiree isn't it, what's that on your hand?" How could Albert not notice Dali's little gesture?

"Nothing." Dally hid it tighter.

Albert pursed his lips and swung the whip with his left hand behind his back, and Dali stumbled a few steps as if he had been pushed by a large force, bracing his hand against the wall to avoid falling.

"Who's pushing me?" Dali craned his head and yelled, behind him Mokken and Pierre looked at him as if they had seen a ghost, in their eyes Dali took a few steps forwards on his own, as if he was drunk.

"So it's boxing gloves, looks like Mr Desiree has his own hobbies, that's good, but you're not very good, it's not nice to take it out on your classmates when you can't hit the sandbags. Let me teach you." Albert didn't even ask for Derek's permission, and grabbed Derek's fat hands, took off his boxing gloves, and barely shoved his own hands in.

"Concentrate and watch!" Albert didn't even give Dali time to react and quickly threw a punch.

Dali was so scared that he couldn't move a muscle, because teacher Albert used him as a reference point, his left fist came out from beside his left ear, and his right fist gave birth to the wind right beside his right ear, he could barely see how Albert threw the punches, and there was only a shadow of a fist in front of his eyes.

Time seemed to pass for a long time, but it was actually very fast, as Albert stopped throwing his punches, Dali's feet went limp and he fell spread-eagled to the ground.

"Don't let me see you guys bullying your classmates again, and if you want to sue your parents, go ahead."

Albert took off his gloves and shoved them back into Dali's arms, disgustedly patting his palms soiled by Dali's sweat in the gloves, and turned to leave.

To the laughter of his classmates, the four Dali's left in disgrace, without even a harsh word.

"Wow, Luke, your older brother is pretty cool!" Fleiger exclaimed impatiently.

"Harry... Luke, I wish I had your brother's hands, in that case, if he ever sandbags me again, I'll punch him back hard." Harry looked envious.

"Raid mission condition answered, congratulations to the host, get the reward of a copy of McLean's Alchemy, please keep up the good work."