tide. noun. the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun. [Post-Wano] Sanji would kiss him if that were not a terrible, terrible idea.

AU in which the royal magic is gifted to retainers through a magical sex ritual. A lot less porny than the description makes it seem. More of a coming of age angst fest that delves into the meaning of consent and free choices.