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As a stay-at-home otaku, Mark could only fantasize about anime wives, gaming beauties, and living a life of idleness while waiting for death.

He never imagined that he could actually travel through time.

When he opened his eyes, touched his face, jumped up and down, felt his heartbeat and breathing, and looked in the mirror, his disbelief turned into shock.

"Oh my god!"

"I turned into Sasuke?"

"Are you kidding me?"

"I must be dreaming!"

Sasuke pinched his thigh. "Oh my god, it hurts."

In *Naruto*, although Sasuke is the second male lead, his handsomeness and popularity are nearly on par with the protagonist, Naruto Uzumaki.

"Wait!"

"What time is it now?"

As an otaku who often lived out whatever fantasies he wanted in his dreams, he wasn't particularly panicked about suddenly finding himself in the world of *Naruto*.

First, he checked his own cultivation.

"Wait, something's wrong!"

"Where's the obligatory system that every time-travel story has?"

Sasuke called out, "System!"

Unexpectedly, a transparent system page popped up in front of him, accompanied by a voice: [Host, I am here.]

Sasuke sighed. "What a responsive system."

[Thank you for the compliment, host!]

Sasuke asked, "What kind of system do I have?"

"How do I complete missions and upgrade?"

[Answering the host, your system is the *Invincible Sign-in System*. You only need to trigger sign-ins to receive invincible rewards.]

Sasuke exclaimed, "I like this system! The sign-in system is simple and suits my lazy personality."

"So, where do I go to sign in next?"

The system replied: [The *Invincible Sign-in System* doesn't directly issue sign-in tasks. Like the open-world game *Genshin Impact*, the host needs to explore on his own.]

Sasuke hadn't expected it to be an exploration-type system.

"Will it be difficult?"

[Not at all,] the system reassured. [By touching specific points, you can trigger hidden sign-in missions and receive corresponding rewards.]

Sasuke nodded. "Okay, I'll give it a try."

Sasuke searched the house but failed to trigger a sign-in.

"This is harder than I thought!"

His eyes began to itch, so Sasuke reached up and rubbed them.

Unexpectedly, the system prompted: [Congratulations on successfully signing in! Reward: Sharingan upgrade to Eternal Mangekyō Sharingan.]

Suddenly, Sasuke's eyes burned as though a source of immense power had awakened within them.

"Whoa!"

Sasuke was stunned.

"That was so easy? All I did was rub my eyes, and I got the Sharingan upgrade?"

"Holy shit!"

Sasuke was thrilled. Starting with the Eternal Mangekyō Sharingan? His future looked promising.

He immediately continued exploring his body.

Touching his hands, feet—nothing happened.

Then, when he touched his dantian…

[Ding!]

[Congratulations on successfully signing in! Reward: Chakra upgraded to Jounin level.]

In an instant, terrifying chakra surged from Sasuke's dantian, coursing through his entire body.

His whole body warmed, and Sasuke felt that at this moment, he could kill an elephant with one punch.

"I'm so strong!"

Sasuke was elated.

He had signed in to gain the Eternal Mangekyō Sharingan and Jounin-level chakra.

"This system truly deserves to be called invincible!"

Now, in this world of *Naruto*, he could do as he pleased.

Knock! Knock!

Just as Sasuke was basking in his new power, there was a knock on the door.

Sasuke opened it.

Standing outside was a petite, cute girl with long pink hair. She wore a red cheongsam-style dress with slits, perfectly accentuating her slim, attractive figure.

"Haruno Sakura..."

Sasuke was a little surprised. At this close distance, Sakura's skin was so delicate, it seemed as though it would melt at a touch. Her face was rosy, and she exuded the innocence and shyness of a young girl.

Wow, a real-life anime beauty.

He could even smell the soft fragrance of Sakura as he took a breath.

"Sakura, what brings you here?"

What she said next shocked Sasuke.

"Sasuke, I like you. Will you be my boyfriend?"

As she spoke, Sakura's cheeks turned red, and she shyly handed him some homemade food.

This…

An invincible system and a beautiful girl confessing to him at the start?

This was beyond exciting!

Sasuke thought that if this were the original Sasuke, he would definitely reject her.

But he was no longer that Sasuke.

"Alright, Sakura. From now on, you're m"

Haruno Sakura's eyes widened, unable to believe what she just heard.

Whenever she came to see Sasuke in the past, she was either coldly turned away or sent home empty-handed.

Sasuke had never been kind to her!

He was always serious and brooding, as if the entire world owed him something.

Yet, even after all that, Sakura never gave up on her feelings for him.

She had even parted ways with her childhood friend, Yamanaka Ino, because of their shared affection for Sasuke.

"Sa...Sasuke, what did you just say?"

Sakura raised her delicate, pale face, rosy from shyness and disbelief.

It felt like a dream!

Sasuke looked at the beautiful girl in front of him, feeling more joyful than ever.

Before the time travel, he could never have imagined receiving this kind of attention.

'She is the heroine of *Naruto*, Haruno Sakura!' Sasuke thought, his eyes lingering on her pink hair, which was neatly styled, just as he remembered from the anime.

From the very beginning, Sakura had always been infatuated with him. If it weren't for the [Invincible Sign-in System], Sasuke might not have had the courage to pursue things differently in this world. But now, with the Eternal Mangekyō Sharingan and Jonin-level chakra at his disposal, even Hatake Kakashi would be forced to bow before him.

Sasuke smirked, his tone teasing yet confident. "Silly girl, of course, I'm serious."

"From today onwards, you're my girlfriend."

In the original anime, Sakura's character was often criticized—overshadowed by Hinata's kindness and Naruto's relentless pursuit of her. But that was because everyone saw Naruto as the protagonist, and his devotion to Sakura made her seem dismissive, unworthy in comparison. Yet Sakura, despite everything, had always loved only Sasuke. That unwavering loyalty had to count for something.

Sasuke chuckled to himself. 'I am going to have every beautiful woman and make a big harem.'

Though her love for him might have stemmed from his looks, the fact remained—Sakura had never wavered. She had always been Sasuke's girl, even when he had distanced himself from everyone. Now, as Sasuke stood there, watching her eyes light up with joy, he couldn't deny the excitement in his chest.

"Sakura," Sasuke said, his voice growing tender, "You've loved me for so long, and I've seen everything you've done. Be my girlfriend."

Sakura's heart pounded in her chest. She had dreamed of this moment countless times but never imagined it would actually happen. The confession, the acceptance—it was all too surreal. Without thinking, she rushed forward, throwing her arms around him. She clung to Sasuke, as if holding on to her deepest desire finally made real. All those sleepless nights, all her hopes—now fulfilled in his embrace.

Sasuke, feeling her body pressed against his, smiled inwardly. As an otaku in his previous life, he had fantasized about moments like this countless times. To hold an anime beauty in his arms, to feel her warmth—this was beyond his wildest dreams.

"Sasuke, I... I like you so much!" Sakura whispered, her voice trembling with emotion. She had admired him since they were children, never thinking her feelings would be reciprocated. Now, Sasuke had accepted her—*her* of all people. It was too much to handle.

Sasuke held her tighter, relishing the moment. 'So, this is what it's like to hold an anime wife,' he mused, a grin spreading across his face. It was even better than he had imagined. Anime girls were perfect—no flaws like the women from reality. They were the dream companions of every otaku, the ideal fantasy.

But something nagged at Sakura's mind. As her excitement began to fade, a creeping doubt settled in.

'Is this really Sasuke-kun?' she wondered. 'Why is he acting so different?'

Her thoughts flashed back to a moment in the moment when Naruto had transformed into Sasuke to deceive her. Could it be happening again? Could Naruto be pulling the same trick, toying with her emotions? The memory sent a chill down her spine, her face draining of color.

Suddenly, she pushed Sasuke away, her heart torn between happiness and suspicion. Her usually neat pink hair was slightly disheveled from their embrace, and her red cheongsam clung to her in a way that only emphasized her inner turmoil. She gazed at Sasuke with a mix of doubt and longing.

"Sasuke," she began, her voice shaking, "I'm so happy you accepted me, but... are you really Sasuke?"

Sasuke's smirk faltered for a moment, caught off guard by her question. He hadn't expected her to doubt him. 'Have I overplayed my hand?' He thought.

But this wasn't the time for panic. There were a few ways out of this situation. He could reveal his true nature—that he was a time traveler now living in Sasuke's body. But that was too risky. Sakura wouldn't understand, and the last thing he needed was to blow his cover.

The second option was to use the Sharingan to cast an illusion on her, to dispel her doubts and make her believe. But that felt cheap, unworthy of his ambitions. He didn't want to rely on tricks to win Sakura over.

No, the best approach was to let his words and emotions do the work.

Sasuke took a step back, his expression softening as he smiled. "I get it, Sakura. I know I'm different now. If you can't accept me like this, I won't hold it against you."

He turned his back to her, a calculated move to give her space, knowing full well that Sakura could never walk away from him. She had loved him for years, and that love wasn't something she could easily discard.

Sakura hesitated, her heart torn. This was the Sasuke she had adored since childhood—the one she had fought so hard to win over. But why did he feel so... different? The pride, the confidence, the charm—it was all there, yet something was off.

"Could it really be... Naruto in disguise?" She wondered.

Sasuke glanced over his shoulder, his smirk returning. "Naruto? He might be able to mimic my appearance, but he could never *be* me, Sakura. Uchiha Sasuke is one of a kind."

Sakura's doubts began to fade. Sasuke's arrogance, his unmistakable pride—it was something Naruto could never replicate. Only Sasuke could be so effortlessly cool, so confident. And in her heart, she knew—this was the real Sasuke.

In a blur of movement, Sasuke closed the distance between them, his hand catching hers gently. Sakura gasped at his speed. This was the power of the Uchiha, the strength she had admired for so long.

"Feel it for yourself, Sakura," Sasuke whispered, his voice low and smooth. "Is this the hand of an impostor? Or the hand of the real Uchiha Sasuke?"