Fourth part of Douluo Dalu.

Fifteen years ago in a barren stretch of the Pacific, a cruise ship collided with an iceberg and was lost at sea. More than a decade later, Hideto Yashiro—a ship engineer—died in a fatal car accident. The unlikely connection between these events only comes to light on the luxury liner St. Aphrodite during her maiden voyage.

Aboard it on a much needed vacation, Kogorou Mouri, his daughter Ran, Conan Edogawa, and the Detective Boys enjoy a trip provided by Sonoko Suzuki's family. But their fun is soon cut short when a game of hide-and-seek leads to Sonoko's disappearance. Some time later, the CEO of the Yashiro group, who built the St. Aphrodite, is found stabbed to death and her father missing. While the police's investigation turns to a dead end, Conan closes in on the culprit. Unwilling to be apprehended, the culprit threatens to blow up the St. Aphrodite and sink all her passengers.

As the ship's hull rapidly fills with water, the truth behind the vengeful murders is finally revealed. With no place to escape, Conan and Kogorou must wrestle with the elusive culprit before everyone on board is dragged to the ocean floor.

[Written by MAL Rewrite]

The year is 2040 and the galaxy is flourishing with several colonies and advanced technology. AI is near perfection and the current top idol is the near-completed Virturoid Idol Sharon Apple. All that is missing are her actual feelings, which instead are supplied by Myung Fang Lone. Sharon's debut concert is on planet Eden, where at the same time, fighter pilots Isamu Dyson and Guld Bowman battle over air superiority for the "Supernova Project." Isamu, Guld and Myung were once childhood friends, but after an accident seven years ago, they went their own separate ways. With Myung back in the picture, the old disputes are once again awakened. And when an unstable and illegal AI technique is installed in Sharon, the situation is worsened.

Kyousui "Sui" Tougoku inherits a traditional Japanese-style cafe called Rokuhoudou from his grandfather, which he manages alongside Gregorio "Gure" Valentino, Tokitaka Nagae, and Tsubaki Nakao. Their hospitality par excellence undoubtedly turns any one-time visitor into a regular. Having gone through their own share of trials and tribulations, the staff at this modest cafe do their best to serve their customers—whether it be through tea, sweets, or even helping with the various troubles one may have. Although most days pass pleasantly, the small world of Sui and his friends takes an unexpected path when their reputation as a cafe flourishes overnight. [Written by MAL Rewrite]