Just as in this life, the afterlife needs a calm troubleshooter to deal with the bureaucratic headaches that come from keeping things in order. Enter Hozuki: a cool and collected demon who’s badly in need of a vacation. (Source: HIDIVE)

The warship Aegis Destroyer is conducting public exercises in Maizuru Bay where, coincidentally, a suspicious foreign ship was recently spotted. Conan Edogawa, Ran Mouri, Kogorou Mouri, Sonoko Suzuki, and the Detective Boys all receive a ticket to attend this event. However, while the ongoing military operations are underway, one of the crew members comes across a lieutenant's severed left arm. Conan later discovers that a foreign spy may have infiltrated the warship to obtain classified information by any means necessary. If the information were to leak, Japan's line of defense would be exposed, leaving the country unprotected from hostile attack.

With the help of the police at sea while other friends and allies investigate on the mainland, Conan must now prevent this national crisis and identify the spy for the sake of Japan.

[Written by MAL Rewrite]

After the conclusion of Hakuouki, Chizuru Yukimura and the Shinsengumi are forced to flee Kyoto and set sail for Edo. In their commander Isami Kondou's absence, vice-commander Toshizou Hijikata steps in as acting commander. However, Hijikata is not only struggling with the extra leadership duties—which worries everyone around him—but also a newfound uncontrollable bloodlust. To make matters worse, the urge does not affect him alone, and it is even beginning to drive some of his subordinates mad. Finally, Kondou returns with orders from the emperor to defend the castle, and a new name for their squad: the Kouyou Chinbutai. But in war, the balance of power can shift suddenly and allegiances can waver. In Hakuouki Hekketsuroku, Chizuru follows the Shinsengumi into the heart of war and continues the search for her missing father, all while the bond between her and Hijikata grows ever stronger. [Written by MAL Rewrite]

Kouichi Uehara is a fourth grade student living in the suburb of Tokyo. One day, he picks up a large stone which turns out to be a fossil of a baby "Kappa" who has been sleeping underground for the past 300 years, and names it "Coo." They become good friends and Coo starts living with Kouichi's family. However, Coo has a hard time adjusting to life among humans and misses his kind.