Prologue: The Boy Who Saw Numbers
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The world, to most people, is a mess of feelings.
Excitement. Nervousness. Friendship. Jealousy. The quiet ache of wanting something you cannot name.
But to Hiroshi Asagiri, the world was something else entirely.
Numbers. Equations. Laws. The elegant machinery of the universe, spinning in perfect mathematical silence.
From the moment he learned to count, Hiroshi understood that numbers made sense in a way people did not. Two plus two was always four. Gravity always pulled. Light always traveled at the same speed, no matter who was watching. The universe followed rules—clean, beautiful, predictable rules—and those rules did not change based on mood or circumstance.
People, on the other hand, were unpredictable. They laughed when nothing was funny. They grew quiet for reasons they could not explain. They asked questions with no correct answer.
Hiroshi found this exhausting.
So he did what made sense. He retreated into textbooks. He filled notebooks with calculations. He taught himself programming languages and read about black holes and studied the motion of stars. His mind became a place of order, and he liked it there.
His family worried sometimes. His mother would ask if he had friends. His father would suggest he join a club. Hiroshi would nod and say nothing, because explaining that he did not need friends felt too complicated for words.
Then came Sōta. Loud, impossible, unstoppable Sōta, who sat next to him in sixth grade and decided, without asking, that they were best friends. Hiroshi never understood why. But Sōta was tolerable. Sōta did not expect emotional conversations. Sōta simply existed nearby, eating snacks and making jokes, and somehow that was enough.
Hiroshi thought that was all he would ever need.
He was thirteen years old. He was the top student at Aozora Daiichi Middle School. He spent his mornings solving problems and his evenings reading about physics and his weekends writing code. His life was a straight line, clean and predictable.
He did not know that straight lines can curve.
He did not know that the universe has a way of introducing variables when you least expect them.
He did not know that a girl with a ribbon in her hair and a smile like morning light was about to walk into his classroom, sit beside him, and quietly, gently, change everything he thought he understood about the world.
Some things cannot be solved with numbers.
Some things must be felt.
This is the story of how a boy who loved equations learned the most important lesson of all: that some equations are better solved together.
This is a new start.
This is a story from the beginning.