Reiji Kanzaki has spent his whole life proving hypotheses. But there's one he's never been able to solve: why logic keeps failing him every time Masato Shibata walks into the room. A brilliant, ice-cold physics professor and the detective who's been his closest friend for ten years, Reiji and Masato have cracked case after case together, one running on data and deduction, the other on instinct and a stubborn refusal to leave. Neither of them ever noticed the equation quietly building between them, until a jealous mistake, a desperate student's confession, and a woman who deserves nothing less than the truth force them to finally look at what's been there the whole time. The Edge of Equilibrium is a slow burn MM romance built on a mystery-thriller backbone, where every deduction hides a feeling neither man knows how to name, and every solved case brings them one step closer to the one truth Reiji can't calculate his way out of: he's already fallen, completely, for the one person he never thought to suspect.