Never Dance with a Demon by Honey Phillips

She lives by the rules.
He breaks them for a living.

Isadora Solis has built her life on precision, control, and perfectly executed steps. She doesn’t make mistakes on the dance floor, and she definitely doesn’t improvise.
So when Malachi Vexis strides into her studio—late, arrogant, and completely incapable of following even the most basic waltz—she knows exactly what he is.
A disaster.
Unfortunately, he’s also her newest student. Bound by a dangerous demonic contract, he needs to win an upcoming competition without using magic, or lose far more than his pride.
Which means he needs her.
As their lessons heat up and the lines between discipline and desire begin to blur, Isadora finds herself drawn to the one male who could ruin everything she’s worked for.
Because the only thing more dangerous than dancing with a demon… is falling for one.