Sakura-machi had grown quiet under the soft glow of early spring. But inside the Kurotsuki household, the quiet was deceiving.
Fourteen-year-old Kurotsuki Tenkai sat cross-legged on the tatami mat in his bedroom. His ThinkPad T23 had been replaced with a custom rig capable of simulating future computing environments—far beyond what anyone in 2009 could imagine.
Aion: "Tenkai, binding vow now matured."
Tenkai's galaxy eyes flickered faintly. "Excellent. Now we can operate at full capacity without leaving traces. Efficiency maximized."
...
Downstairs, Masaru and Akane were once again caught between pride and bewilderment.
Masaru peeked into the room. "So… my fourteen-year-old is now using supernatural energy… curse?"
Akane pinched her nose. "I don't even want to know. Just… eat lunch, dear."
Tenkai laughed softly. "Mom, Dad, don't worry. My explanation will be simple."
Masaru scratched his head. "I still can't believe you're managing global projects while doing homework."
Tenkai: "Homework? Already completed."
Akane rolled her eyes. "Naturally."
...
By 2010, Tenkai had analyzed the predicted smartphone boom using Aion's predictive algorithms.
Aion: "Optimal application development window: 2009–2011. First target: messaging and media platforms with AI-enhanced features."
Tenkai leaned over his screen, designing:
EchoChat: Messaging app with real-time AI auto-translation, predicting conversational context. Early WeChat/Telegram hybrid.
TuneFlow: Music app that predicts taste patterns, integrates playlists with behavioral analytics. Proto-Spotify AI.
NoteSphere: Self-organizing digital notebook. Early Evernote/Notion hybrid.
Each app was coded years ahead of public awareness. With AI simulations, he could predict UX trends, data storage needs, and server loads years before other companies.
Masaru peeked in. "Son… are these… apps legal?"
Tenkai smirked. "Legal? Let's just say, by the time the market catches up, I'll be three steps ahead."
Akane shook her head. "I swear… one day you'll tell me you're building apps that run the government."
Tenkai's galaxy eyes twitched faintly. "Not today, Mom. Just shaping the world quietly."
...
Despite the technological empire, Tenkai never neglected his body.
Aion: "Physical efficiency optimized. Training: advanced martial arts forms purchased from Abyss Ledger. Morning and evening sessions remain essential."
Tenkai practiced:
Martial Flow: Fluid strikes, precision kicks, energy control exercises.
Agility Drills: Multi-directional movement and reaction speed.
Strength & Flexibility: Push-ups, squats, yoga for optimal curse energy circulation.
Tenkai: "Every calorie, every movement, contributes to my curse mastery."
Akane sometimes peeked in. "Son… are you… meditating or gaming?"
Tenkai: "Both, Mom. Efficiency is key."
Masaru groaned. "I feel obsolete."
...
By 2011, Kurotsuki Industries became a household name:
Ad revenue, affiliate marketing, and developer tools funded further R&D.
Viora, EchoLink, and NeuraNet had millions of users, including early adopters worldwide.
Government collaborations ensured his AI tools were used for national projects while maintaining secrecy.
Aion: "Current status: youngest millionaire and globally influential technologist. Jujutsu knowledge integrated with predictive analytics. Reverse curse technique mastered at age fifteen."
Tenkai leaned back. "All objectives met… except domain expansion. Not a priority yet."
Masaru entered with tea. "Son… at what point do I stop calling you my kid and start calling you… my CEO?"
Akane elbowed him. "Don't forget, you're still in diapers in his timeline mentally."
Tenkai chuckled. "Focus, parents. Empire building is serious business."
...
One busy Tokyo afternoon, Tenkai wandered the streets, testing a new creation on a prototype smartphone. Music echoed from his headphones, oblivious to the crowd.
A young man strolled past—Gojo Satoru—headphones in, sunglasses on. The music seemed louder than life.
Suddenly, a ripple of immense cursed energy caught Gojo's attention. He paused mid-step, turning sharply.
At the corner sushi shop entrance stood a boy: small, unassuming… but radiating cursed energy at levels Gojo had never anticipated.
He removed his sunglasses, activating Six Eyes. His jaw dropped.
Gojo (muffled by music)
The music continued, completely oblivious to the bizarre anomaly in front of him. Pedestrians flowed past, utterly mundane.
Gojo's mouth opened again, this time slightly louder:
Gojo: "Wait… WHAT THE—"
Tenkai, without even looking back, entered the shop.
Aion: "Advisory: anomaly detected. High probability individual is Satoru Gojo. Recommendation: casual interaction, maintain cover."
Tenkai smirked faintly. "Understood. Let's enjoy this… unexpected entertainment."
And that was where the streets of Tokyo paused, the music kept playing, and two prodigies—one of technology, one of cursed energy—stood unknowingly on the brink of their first real collision.