Uh... He's just reading a story about sex slaves and unclear on what that means. This is basically a degenerate fetish story.
Like the novel title isn't trying to hide anything the way the title here is "Slave Harem in the Labyrinth of the Other World"
... More missing chapters. Fuck all those stupid pirates who think they aren't fucking pirates. All they are going to do is make everyone go to aggregators.