Bottomless Swamp

When a teenage boy is abducted and knocked unconscious, he wakes to find himself chained up in a strange place. He sees a beautiful boy embracing a naked man and fears he's been kidnapped to be assaulted by a pervert, but his captor's true nature is shown when he grins, revealing a pair of fangs!

Original Webtoon

This series was discontinued once it became officially published by Bookcube.