One Piece: Romance Dawn Story

The Straw Hat Pirates, searching for the great passage "Grand Line", are in trouble when their food runs out! Luffy, searching for food on his own, finds a ship belonging to the pirate, Gary, and takes it over!! He lands at a nearby town... Luffy was attacked by a young girl, Silk, who mistook him for a member of the other pirate gang. As the two eat a meal, they tell their stories. Meanwhile, Gary and his band are burning with anger at Luffy, demanding payment from the town's defenseless citizens...!! (Source: Jumpland)Around the the 37th year of the Meiji Era (1904) in the midst of the Russo-Japanese war, the small Japanese army, in need of assistance, uses its special flying (thanks to a benevolent demon) ship, the Amanohara, to attack Russia’s major base at Port Arthur (Lushun). Umakai Shintaro, a Russian diplomat originally from Japan, defects and goes to Sapporo to teach at a girls academy. However, that girls academy is not typical – it is on board the Amanohara, and the five girls Shintaro teaches are known as the Raimu Unit – girls with the ability to summon powerful beings to fight for them.