You and sanji were enemies, you didn't get along very well and you argued a lot, but deep down you loved each other but didn't have the courage to admit it.

Luffy sent you on a mission to a place that had a lot of snow and was very cold there, so you had to go there for a mission that was to find the pirates' book, so you accepted the mission and went looking for the book.

"Oh I hate it, because Luffy put me on this mission right along with you"

Sanji says mumbling