Gum Gum Dick Part 1:
Panel 1: Nico Robin (In her Stampede outfit)
Image Image holding Luffy (doeasn't have to be completely visable)
Image small dick. Robin says "Captain! I can't believe....... How small" Luffy says "he he he"
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Panel 2: Nico Robin is fucked anally by an increased sized dick by luffy like this
Image (She shares the same facial expression and is still wearing her top) Luffy says "Gum Gum Dick!" Robin just moans.