I Became a Prisoner Trainer in the Dungeon

In 'I Became a Prisoner Trainer in the Dungeon,' a reincarnated protagonist navigates a fantasy world without special powers. Captured by the Demon Lord's army, they are coerced into training captives in the art of pleasure. Failure means death, with a unique twist: every demise sends them back to the moment of their last intimate encounter. This Korean web novel delves into adult themes of fantasy, psychology, and tragedy, interwoven with elements of blackmail, demons, dungeons, and supernatural beings like succubi and vampires.