Nico Robin's New Foot Slave (Patreon)

A defeated Luffy finds himself on the floor, held by a group of hands blooming from it, keeping him on his knees as he runs his tongue across his crewmate's feet. Meanwhile, a triumphant Nico Robin sits back and enjoys the view as her feet get cleaned. 

Robin: "I'm sorry it had to come to this, captain; but your constant shouting and running around makes it difficult to concentrate on reading. At least this way you are a lot quieter ". 

Luffy: "..." Stops licking for a moment to look at her, visibly upset

Robin: "What? I didn't tell you to stop, and don't look at me like that," *slaps him slightly with her right foot * "You have no one to blame for this but yourself, now keep licking!".

While saying it, Robin had a serious death glare in her eyes, fitting for a woman known as the demon child, which was enough to threaten the rubber boy into submission and force him to reluctantly go back to licking her foot up and down.

Robin: "That's what I like to see, this will be the norm from now on, so get used to the taste. Just imagine it is your favorite piece of meat".