"Oh, isn't that Kamijou-kun? Why are you back so soon?" Lin Luo stood up from his seat and walked towards the boy with the hedgehog haircut, his expression resembling that of an old friend meeting after many years.

"I don't have classes this afternoon, so I came back early... Ah, wait, shouldn't I be the one asking the questions? Who are you two, and why are you in my house?" Kamijou Touma instinctively replied, but halfway through, he snapped back to reality, pointing at Lin Luo and Tohsaka Rin with a shout.

"Eh, Touma, aren't they your friends?" Index commented, then lowered her head and continued devouring her food.

"Hey, hey, Kamijou-kun, are you kidding me? Or are you afraid we're here to freeload meals and are pretending not to know us?" Lin Luo said, half-jokingly, half-seriously.

"Huh?" Kamijou Touma froze again. "I know... you?"

"I say, Kamijou-kun, you’re taking this joke too far." A look of displeasure crossed Lin Luo's face. "You can pretend not to know me, but you can't pretend not to know her!" As he spoke, Lin Luo pointed behind him at Tohsaka Rin.

Seeing Lin Luo's serious expression, Kamijou Touma dared not speak, desperately searching the recesses of his memory, his gaze darting between Lin Luo and Tohsaka Rin.

Meanwhile, Tohsaka Rin was equally bewildered, unsure what trick Lin Luo was playing.

"Sigh, Kamijou-kun, I’m truly disappointed in you, pretending not to recognize your own kin." Lin Luo sighed, then pointed solemnly at Tohsaka Rin and announced, "She is your biological sister, Kamijou Rin!"

Pfft!

A mouthful of tea sprayed out, followed by violent coughing—not from Kamijou Touma, nor Index, but from Tohsaka Rin... er, now Kamijou Rin.

"See, you made your sister so upset she choked on her tea. I curse you to forever receive ramen without the seasoning packet." Lin Luo walked back to Kamijou Rin's side, shaking his head in exasperation, as if disappointed in a lost cause.

At that moment, Tohsaka Rin finished coughing. She grabbed Lin Luo by the collar and dragged him aside, her eye twitching as she hissed low, "You bastard, why am I that spiky-haired kid's sister? You better explain yourself clearly!"

Of course, it was for security. How formidable was the Charm Master's charisma? Even if this brother possessed the bloodline of the King of Harem, one couldn't easily confront him head-on; three or four layers of insurance were necessary.

Naturally, these thoughts couldn't be spoken to Tohsaka Rin. Lin Luo could only say, "It's naturally for your safety. Right now, the only person capable of being your shield is that spiky-haired boy. If we want to take refuge under him, we need a pretty good reason."

"What kind of good reason is that? Who would believe a strange sister suddenly appearing out of nowhere!" Tohsaka Rin was practically tearing her hair out.

"Don't worry, this is absolutely fine. That guy suffered amnesia recently; he doesn't remember anything from before. So, as long as we act convincingly, there won't be any flaws."

"Ah!" Tohsaka Rin froze, then said with some difficulty, "But... isn't it a bit wrong of us to use him like this? After all, we are currently enemies with the entire Academy City."

"You don't need to worry about that either. Although that spiky-haired boy doesn't look impressive, his vitality is stronger than a cockroach," Lin Luo explained. "And you don't need to feel guilty. That spiky-haired boy holds the title of Charm Master; his favorite thing is to show off in front of beautiful women and make them pledge themselves to him. According to my incomplete statistics, the number of girls he’s charmed is at least..."

As he spoke, Lin Luo held up five fingers, originally intending to say five digits, but since he had already NTR'd the Misaka Sisters, the Charm Master's harem size... Lin Luo flipped his hand over. "Around ten, perhaps."

Immediately, a look of disgust crossed Tohsaka Rin's face as she asked, "Are you serious?"

"Absolutely certain!" Lin Luo declared emphatically.

"If that's the case, then there's no problem, but... is it safe to be with him? He won't act recklessly, will he?" Tohsaka Rin was still a bit uneasy.

Lin Luo consoled her, "Although that spiky-haired boy's private life is a bit... promiscuous, ultimately, he’s just fickle. His nature still holds a sliver of kindness; he wouldn't lay a hand on his own biological sister. So, for now, you just need to play this role well. The other task is to trick that idiot foodie nun into teaching you her magic."

"Alright, hearing you say that relieves a lot of my pressure." Tohsaka Rin nodded, agreeing to the plan.

If you have that attitude, my pressure is also greatly reduced. Lin Luo thought to himself. The Charm Master's skill forced him to be cautious; dual insurance was absolutely necessary. Now, with his smear campaign, the Charm Master definitely had negative favorability in Rin's heart. This layer of insurance was basically set. Next, he would add another layer of insurance on the Charm Master's side later.

Then, returning to the "scene," Lin Luo led Tohsaka Rin to Kamijou Touma and sighed, "Kamijou-kun, your sister was very upset just now, never imagining that the little brother she cared for so much since childhood wouldn't recognize her. Alas, I really don't know what to say about you, Kamijou-kun."

Because Lin Luo and Rin had been speaking very softly just moments ago, and Kamijou Touma was completely immersed in the shocking "fact" that he suddenly had a biological sister, he hadn't paid attention to their whispered conversation. As for the silver-haired one beside him... she was still eating!

"Um... you really are my sister?" Kamijou Touma pointed at Tohsaka Rin, still looking quite unconvinced. Putting aside his own memory, even the records he obtained after losing his memory didn't mention anyone named Kamijou Rin.

Rin nodded, her face cooperatively showing an expression of sadness and disappointment.

"Nonsense, how could this be fake!" Lin Luo finally erupted in mock fury. He shouted, "Are you still pretending not to know me now? Fine, I'll give you the evidence, item by item... Firstly, your father is Kamijou Tōya, your mother is Kamijou Shiina, you have a cousin named Ryūjin Otoko, and also, you were born with a curse of misfortune because your right hand possesses Imagine Breaker, capable of erasing all Superpowers and magic, which is why you always use your left hand when... when you relieve yourself, and..."

"Wait! I believe you, I believe you!" Kamijou Touma collapsed onto the floor, his face filled with despair. Of the evidence Lin Luo mentioned, he only knew half, and some parts he didn't even know himself, like using his left hand for... private matters. To prevent further exposure of his personal secrets, he had no choice but to believe.

"Then why were you pretending not to know just now?" Lin Luo pressed on relentlessly. "Do you know how sad this made your sister?"

"This..." Kamijou Touma found it difficult to say. He glanced at Index, who was still sweeping up the food, beckoned Lin Luo and Rin over, and walked aside before whispering, "Actually, I lost my memory a while ago."

"What?" Although they already knew, both pretended to be very surprised.

Afterward, Kamijou Touma recounted the circumstances of his amnesia. Of course, these details were relayed to him by someone else, and he had no memory of them, so he spoke as if discussing someone else's affairs.

After listening, the two let out another round of intentional gasps of sympathy.

"So that's how it is. Then we truly misjudged you," Lin Luo sighed.

"No, no, this isn't your fault. Making my sister sad, it's all my fault." Kamijou Touma's face was full of apology.

"No, my brother is very brave, I am very pleased." Kamijou Rin smiled understandingly. Of course, where no one could see, her right hand reached behind Lin Luo and pinched a piece of soft flesh on his waist, twisting hard!

Lin Luo nearly cried out. Damn it, she’s too vicious!

P.S.: Whoever says the protagonist is...