Lupin & co. compete with a greedy bank president and her goons to solve the mystery leading to a broach, a treasure said to be behind the success of history's most powerful rulers. 

(Source: ANN)

Four months before Count von Lohengramm of the Galactic Empire faced Yang Wen-li of the Free Planets Alliance at the Battle of Astarte, he was still just Reinhard von Müsel. The youngest admiral in the Empire's history, Reinhard was disdained and dismissed by his peers as the brother of the Kaiser's concubine. 

Upon arriving at Iserlohn Fortress with his expeditionary fleet, Reinhard immediately receives an order from the ambitious and cunning Fleet Admiral Gregor von Mückenberger: to intercept an Alliance fleet in a neighboring starzone. Despite recognizing this as a veiled attempt to get him killed in combat, Reinhard nevertheless orders his tired and weary men to engage the enemy in the atmosphere of the gas giant Legnica. But unbeknownst to him, this will mark the first of his many historic encounters with the Hero of El Facil.

[Written by MAL Rewrite]

Zenigata arrives on the ship "Machine Gun Kelly", a casino on the water owned by the mafia, because Lupin plans on stealing the casino's money. Lupin and his gang manages to break into the ship's vault but was unable to escape with the money due to Zenigata's shooting. However, there was another purpose the ship had, one that Lupin was aware of; to search for a sunken ship filled with gold. Lupin managed to steal this data while he was on the ship, however, now they have to contend with Zenigata, the mafia, and a secret organization whose base is under Alcatraz, as they attempt to uncover the secret behind the organization and the sunken treasure.

(Source: ANN)

Led by Reinhard von Müsel, the Galactic Empire crushes the Free Planets Alliance in the Fourth Battle of Tiamat. Arriving in the Imperial capital of Odin to a hero's welcome, Reinhard's victory earns him a promotion to High Admiral and the distinguished title of Count von Lohengramm. On the other side, Yang Wen-li safely returns to the Alliance capital of Heinessen without fanfare and reunites with his dear friends.

Reinhard and Yang look forward to a long-awaited reprieve. However, at the request of the scheming Duke Otho von Braunschweig, the Imperial High Command orders the new High Admiral to invade the Alliance with a fleet of twenty thousand ships. After the Duke leaks the plan to the Alliance government, three fleets totalling forty thousand ships are sent to counter the incoming attack and recreate the famous Battle of Dagon. But even though Reinhard is outnumbered two to one, he has an ingenious plan—and Yang sees right through it. Will Yang's superiors heed his warning before it is too late?

[Written by MAL Rewrite]