[adult-rated story/not pwp/hardcore/body modification/fisting/urine play/tool play/urethra play/needle play/whip/voyeurism/semen tank/human horse/orgy/furniture/mobile/gamble/stuck to wall/shooting/all sorts of coercive sexual acts/sexual acts close to torture]

[Please keep in mind that there are hardcore keywords that haven't been mentioned.]

The island was famous among investigators.

An island where slaves roamed in search for cock, identification tags dangling from their nipples, a harness adorning their naked bodies, and various objects inserted into their holes.

Grotesque intercourse and sexual acts bordering on torture were routine in such a place. Human rights were long forgotten, and shame was a violated concept. Both dignity and morals were doused in semen.

To the island’s guests, these slaves were not fellow humans. They were pulsating masturbation tools, toilets in human form.

Investigator Han Yoonseo woke up on a boat heading towards "that" island.

He had been kidnapped.

Raws: https://ridibooks.com/books/875160596