Checkmate manhwa volume 3 features story and art by TAN.

Soohyun's game of seduction continues--he's willing to surrender his body in exchange for the truth about Eunsung and Moon-seob. But as Eunsung opens up to him, he finds the other man to be surprisingly sincere, even worried about the danger he'd been unaware of. Could Soohyun have been wrong about Eunsung all along? As it dawns on him that Eunsung cares for him, will he also recognize that perhaps the rivalry between them was all in his head?