Yoksu

In a world where desire transforms into a demon, manifesting as a beast-like monster known as a “Yaksu.” Song Yu-Geon, a fallen nobleman, meets a Yaksu hunter in the mountains who saves his life. Just then, the man’s eyes turn red, and...

Ignoring Song Yu-Geon’s resistance, he takes him roughly. Song Yu-Geon thought that was the end of it, but soon he finds himself reunited with him...

(Source: Lezhin, translated)