When a college dropout stops for a late night bite at a mysterious ramen stand, he crosses paths with a self-proclaimed deity of matrimony. This bizarre meeting sends the young man hurtling through a horrifying flashback to his not-so-glorious college days when the influence of a cruel new friend turned him from a hopeless romantic into a mischievous “black cupid.”

Yor and Loid may be keeping their true identities from each other, but telepathic Anya knows everything. Now, as they set sail on a luxury cruise, Yor must stop a group of assassins from reaching their target—while Loid struggles with a different mission altogether: figuring out what a good father is supposed to do on vacation.