Kureiji Kuruzu plot
Suguru, a devoted butler on a luxury cruise ship, finds his life turned upside down the day he meets Chizuru, a woman who claims their respective partners are about to cheat. Chizuru tries to convince him that they should quit the cruise and go back to Japan to prevent their partners from cheating when one night they and five other passengers witness a corpse floating in the pool on the deck. Strangely, everyone except Suguru acts as if they didn't see anything. As Suguru and Chizuru try to unravel this mystery, they gradually become attracted to each other.