Back when he was a useless shut-in, Sato Haruki could only fantasize about anime waifus and game beauties while wasting his life away.
He had never once imagined that he would actually transmigrate.
When he opened his eyes, he instinctively reached up to touch his face. He jumped a few times, feeling the steady rhythm of his heartbeat and the flow of his breathing. Then he rushed to the mirror.
"Oh my God!"
"I actually became Sasuke?"
"You've got to be kidding me!"
This isn't a dream, right?
Sasuke pinched his thigh hard.
Damn—it hurt like hell.
In Naruto, although Sasuke was technically the male second lead, his looks and popularity were no less than the protagonist, Naruto Uzumaki.
"Wait!"
"What time period is it now?"
As a former shut-in who used to run wild in his dreams, now that he had truly transmigrated into the Naruto world, he wasn't panicking at all.
First things first—check his chakra.
"No, that's not right!"
"Where's the mandatory system every transmigration story is supposed to have?"
Sasuke called out, "System!"
To his surprise, a transparent interface suddenly appeared in midair, accompanied by a voice.
[Host, I'm here.]
Sasuke couldn't help but sigh. "What a humanized system."
[Thank you for the compliment, Host!]
Sasuke asked, "What type of system are you?"
"How do I complete missions and level up?"
[In response to the Host, your system is called the 'Invincible Sign-In System.' You only need to trigger sign-ins to obtain invincible rewards.]
sasuke's eyes lit up. "I like this kind of system. A sign-in system is simple—perfect for my lazy, laid-back personality."
"So where do I go to sign in next?"
The system replied, [The Invincible Sign-In System does not directly issue sign-in tasks. Like the open-world game Genshin Impact, the Host must explore on their own.]
Sasuke hadn't expected it to be an exploration-type sign-in system.
"Is it going to be difficult?"
[Not difficult.]
The system explained, [By touching with your fingers, you can complete hidden exploration tasks and obtain corresponding rewards.]
Sasuke nodded.
"Alright then, I'll give it a try."
He searched around the room, touching things here and there, but nothing triggered a successful sign-in.
"Looks like it's still a bit tricky…"
At that moment, his eyes felt slightly itchy. Sasuke casually reached up and rubbed them.
Suddenly, the system notification rang out:
[Congratulations on successful sign-in. Reward: Sharingan upgrade—Eternal Mangekyō Sharingan.]
In an instant, his eyes burned intensely, as if a boundless source of power had been unlocked within them.
"Holy shit!"
Sasuke was completely stunned.
"It's that simple?"
"I just touched my own eyes and successfully signed in to upgrade the Sharingan?"
"Nice!"
He was thrilled. Starting off with the Eternal Mangekyō Sharingan—his future was unimaginable.
Without hesitation, Sasuke began exploring further on his own body.
He touched his hands. No response.
His feet. Still nothing.
Then, when his fingers brushed near his lower abdomen—his chakra core—
[Ding.]
[Congratulations. Sign-in successful upon touching Chakra. Reward: Chakra increased to Jōnin level.]
In that instant, terrifying amounts of chakra surged from within his core, flooding his entire body.
Warmth spread through him. Sasuke felt as if, with a full-force punch, he could kill an elephant.
"I'm so strong!"
He was beyond ecstatic.
Sign in to the Sharingan—obtain the Eternal Mangekyō Sharingan.
Sign in to chakra—obtain Jōnin-level chakra.
"As expected of the Invincible Sign-In System!"
At this rate, wouldn't this entire Naruto world be his playground?
"Heh heh heh…"
Just as Sasuke was reveling in his excitement, a sudden knock sounded at the door.
He went to open it.
Standing outside was a petite girl with long pink hair. She was delicate and cute, wearing a red style dress with side slits that accentuated her slender, alluring figure.
"Sakura Haruno…"
Sasuke was slightly surprised. Up close, Sakura's skin was so tender it seemed almost translucent, her fair cheeks flushed with a rosy glow, carrying the shy sweetness of a young girl.
Wow. This was a real, living anime beauty.
Taking a deep breath, he could even catch the faint, fresh scent unique to a young girl.
"Sakura, what brings you here?"
What she said next left Sasuke utterly stunned.
"Sasuke, I like you. Will you be my boyfriend?"
Her face turned bright red as she shyly handed over the food she had personally bought for him.
This…
An invincible sign-in at the start.
A beautiful girl confessing at the start.
Now this was exciting.
Sasuke thought about the original storyline. The Sasuke from the canon would never have agreed.
But—ko
He was a transmigrator.
There was no way he would be as rigid and boring as the original Sasuke.
"Alright, SakuraIf
From today onward, you're my girlfriend."