A story of a person who just wants to be a slacker but is reborn as a branch chief of the Navy. What to do when the Beasts Pirates attack?! What to do when a dragon over 40 meters long attacks?! Don't worry, I have Artoria, Esdeath, Erza… At the top war, a blonde knight girl with a great sword chases Kaido, an ice-blue military officer freezes the entire headquarters, and a red-haired kimono warrior fights evenly with Hawkeye. "I have nothing to do with them!" Don says, trying to explain to the Navy.