Plan to get Luffy and Hancock together.

Sequel: https://www.wattpad.com/story/344374243-operation-love-boat-luffy-x-hancock-fan-fiction

This takes during the time skip, a week after Rayleigh left Luffy alone on the island to train. Boa Hancock takes the opportunity to pay Luffy a visit for his birthday. Follow Luffy and Hancock's week together. On their island for two.