If you were to ask what the most helpless thing in the world is, Karasuma Reiyu's current situation would be a strong contender.
"Wait a minute… bro, everyone else's screen just blacks out while gaming, but why is my screen blacking out while I'm playing?"
Staring at the pitch-black world before him, Reiyu couldn't help but genuinely wonder.
"Don't mess with me! I've been playing League of Legends for ten years! This is the final match of my Iron III promotion series—please don't do this to me!"
A helpless cry echoed in his heart. But right now, he couldn't move a muscle, couldn't even open his mouth, let alone speak.
Ding!
"Warning: Host's life force is critically low. Cause: Sudden death from endless hours spent in front of a computer."
Ding!
"All-Heavens System activated. Initiator: Karasuma Reiyu!"
"Due to the host's weak life force, the system can only randomly select a world for transfer."
World selection in progress.
Ding!
"World selection successful! Preparing to travel to the first world!"
"Destination: Demon Slayer!"
A calm, system-like female voice echoed in Reiyu's mind. Then, an overwhelmingly blinding light appeared before his eyes, and his consciousness briefly blurred.
When he regained awareness, he found himself lying on a wooden bed in a small room, covered with a thin blanket.
Before he could even comprehend what had happened, the voice from before returned.
Ding!
"Host transfer complete! Please select your initial skills!"
A holographic interface suddenly appeared in Reiyu's mind.
"Devouring Breathing… Breath of God… what the heck are these?"
He scratched his head in confusion. A small line of text at the bottom clarified:
The host may select three skills as initial abilities.
"Please make your choice!"
Perhaps because he hesitated too long, the voice spoke again, slightly more urgent.
"Ah! I choose, I choose Devouring Breathing, Mangekyou Sharingan, and Susanoo!"
Startled by the urgency, Reiyu randomly selected three options. The unchosen abilities faded away, while his selections gradually expanded in his mind.
A faint vibration coursed through his brain, numbing his body slightly. When he came to, the illusory interface had vanished.
Ding!
"Host's selection complete! Now introducing the chosen skills:"
Devouring Breathing
Type: Breathing Technique
Origin: Original
Forms Available: 10
Current Forms: 10
Description: Devouring Breathing allows the user to consume enemies, converting their power into increased combat ability. The stronger the foe, the greater the gain.
Mangekyou Sharingan
Type: Dōjutsu
Origin: Naruto
Techniques: Tsukuyomi (Left Eye), Amaterasu (Right Eye)
Description: Tsukuyomi, an exclusive genjutsu, can subject a target to 72 hours of torment within a separate world, intensity controlled by the user. Amaterasu, the ultimate attack, focuses the user's gaze on the opponent, summoning black flames that burn until the enemy dies. (Note: In the original Naruto manga, Amaterasu has never actually killed a human.)
Susanoo
Type: Mangekyou Sharingan Exclusive
Origin: Naruto
Forms Available: 5
Current Forms: 2
Description: Summons a spectral warrior around the user capable of offense and defense. Fully formed Susanoo can exceed the size of a mountain.
Reiyu blinked. Seeing these abilities appear in his mind, he was momentarily stunned. As a young man from 21st-century Earth, he was familiar with Naruto, a cultural powerhouse—but why these powers had appeared here baffled him.
Ding!
"Displaying host status panel:"
Name: Karasuma Reiyu
Age: 15
Personality: Cocky loser who likes showing off
Skills: Devouring Breathing, Mangekyou Sharingan, Susanoo
Hobbies: Gaming, chasing girls
Goal: Find a girlfriend (estimated completion: over 100 years; not accounting for host lifespan)
Combat Power: 5 points
Overall Rating: Negative Level 1
Note: Rating levels: Level 1, Level 2, Level 3, Earth Level, Profound Level, Heaven Level, King Level, Emperor Level, God Level
System Note: Host is extremely weak; an unauthorized Negative Level 1 rating has been added, weaker than Level 1.
Reiyu paused. One… two… three seconds.
"What the hell?! Over a hundred years to find a girlfriend?! And a negative one rating?! What kind of messed-up system is this?!"
Roaring in fury, Reiyu, already aware he had transmigrated into another world with a system, found the system's evaluation infuriating—even for the "Universe's Invincible Chuunibyou Handsome Man (Loser)," this was maddening.
Ding!
"Due to host insulting the system, 10 combat points have been deducted. New combat power: -5 points. Overall rating: Negative Level 2. New personality trait added: Likes impotent rage."
Reiyu sighed. Just as he was about to launch another tirade, a long sword suddenly pierced through the wooden door and lodged straight in front of him.
"Whoa!"
He shouted in shock, stumbling back several steps, noticing a strange dampness below.
"Quiet! It's late!"
A slightly aged voice called from outside. A figure wearing a blue haori dotted with white spots and a red tengu mask pushed open the door and stepped in.
Ding!
Urokodaki Sakonji
Identity: Former Water Hashira of the Demon Slayer Corps
Personality: Sharp-tongued but kind-hearted
Skills: Water Breathing
Combat Power: 4396 points
Overall Rating: Supreme
Favorability Toward Host: -1