Limits We Approach

Book One in The Calculus of Us Series

He’s her professor.
She’s his research assistant.
They were never supposed to cross the line.

Seoah came to prove herself — to excel in mathematics, to chase ambition, to build a future defined by her own brilliance. Working under the composed and disciplined Professor Jiwon was meant to be another step toward that goal.

It was not meant to become personal.

But late-night research sessions turn into lingering conversations. Intellectual debates blur into charged silence. Every glance lasts a second too long. Every brush of hands feels like a boundary tested.

Jiwon has spent his life mastering control — of his career, his reputation, his emotions. Wanting his student was never part of the equation.

Yet some limits aren’t meant to remain untouched.

As desire grows and restraint begins to fracture, they must decide what matters more: protecting the rules or risking everything for something neither of them can ignore.

*Limits We Approach* is a slow-burn academic romance filled with tension, longing, emotional intensity, and the ache of almost.

Because sometimes, the hardest line to hold… is the one drawn between two hearts.