Equation of the Heart.

Equation of the Heart.

CHAPTER 0

...🎓 Character Introductions...

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🌸 Main Couple:

Nobita Nobi (19)

Major: Physics

Personality: Clumsy, overly emotional, has a soft heart and terrible luck. Thinks he’s average but is surprisingly smart when motivated (especially when Dekisugi’s around to show off in front of).

Style: Baggy hoodies, oversized glasses, always carrying a beat-up sketchbook or crumpled class notes.

Secret strength: Artistic eye for detail, visual learner, emotional intelligence.

Conflict: Constantly feels inferior next to Dekisugi—never confessed the feelings he's buried since middle school.

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Dekisugi Hidetoshi (20)

Major: Theoretical Mathematics & Engineering

Personality: Polished, charming, sharp-tongued when annoyed. Used to being admired, but deep down, kind of lonely and secretly very observant of Nobita.

Style: Clean-cut, sleek black hair, neutral tones, expensive watch, smells faintly of cedarwood and arrogance.

Secret weakness: Has always been fascinated by Nobita’s unpredictability and sincerity. Keeps his feelings repressed under layers of pride.

Conflict: Doesn’t know how to express emotion without sounding clinical—his rivalry with Nobita hides a deep affection he never resolved.

...****************...

💥 Side Couple 1:

Gian (Takeshi Goda, 20)

Major: Performing Arts

Personality: Loud, protective, outwardly rough, surprisingly poetic. Trying to be more vulnerable but hates being laughed at.

Style: Tank tops, big hoodies, pierced ear, lowkey soft boy core when no one’s looking.

Secret: Writes romantic lyrics in a hidden notebook.

...****************...

Suneo Honekawa (19)

Major: Business and Fashion

Personality: Flirty, snarky, vain—but also deeply insecure under his confidence. Has always had a weird thing for Gian but masks it with teasing.

Style: Designer fits, rings on every finger, always smells expensive.

Secret: Collects polaroids of Gian doing “cute things” from afar.

...****************...

🤖 Side Couple 2:

Doraemon (??? Looks 21)

Identity: AI-powered humanoid prototype from the future, still loyal to Nobita but slowly evolving emotionally.

Major/Role: Works as a research assistant in the Robotics Lab.

Personality: Kind, logical, always puts others first. Now… starting to question what it means to want something for himself.

...****************...

[OC] Kazuki (21)

Major: Experimental AI Research / Café Owner’s Son

Personality: Quiet, mysterious, likes talking to machines more than people. Thinks Doraemon is “more human than most humans.”

Vibe: Cozy sweaters, coffee-stained fingers, quiet smiles.

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...🌸 INTRO: Equation of the Heart 🌸...

There are equations that can be solved on a whiteboard.

And then there are equations like Nobita Nobi vs. Dekisugi Hidetoshi—where no formula, no logic, and no amount of late-night cram sessions can explain why a heart races when the person you hate the most walks into the room.

Nobita never expected to end up at Tokyo’s top university. He certainly didn’t expect to share a major—and half his lecture schedule—with his childhood academic rival, Dekisugi.

Dekisugi, the perfect boy. Golden boy. University heartthrob. Smart, elegant, unbearably smug.

But behind passive-aggressive jabs and sarcastic quips, something has always lingered between them. Something that feels like—

Long stares that last too long.

Jealousy that doesn’t make sense.

Dreams that shouldn’t involve each other, yet somehow… always do.

Throw in some nosy best friends, a glitching robotic cat from the future, two surprise side romances, and a storm of unspoken feelings—and college life is about to get a lot more complicated than final exams.

To be continued...

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