Lucy is in desperate need of a break from the mage life and embarks on a two week cruise alongside her partner, Natsu. What they don't know is that it's a cruise designed specifically for couples. With no other choice than to pretend they are married, the two try to enjoy the cruise the best they can, all the while dealing with uncharted feelings.

Lucy gets a notice that her apartment will be undergoing renovations and has to stay with Natsu for a while. Strange thoughts start to plague her and she has to fight her bodies response to the man she considers her best friend during an adventure they hadn't planned on going on.