The Price Of Obsession

Chae-Sung is a ruthless loan shark who has seen every kind of debtor, until Byun Yu-On. Flawless on paper, Yu-On never misses a payment, no matter how brutal the terms. The kind of client anyone would want. But there is something wrong with him. The way his gaze lingers on Chae-Sung, quiet, unwavering, and far too intent. It is not just business to him, and that is exactly the problem. So Chae-Sung makes up his mind to break that obsession and cut Yu-On out of his life, no matter what it takes.

(Source: Lezhin US)

Note: Includes one extra chapter.