Junketsu no Dansou Reijou Kishi wa Isai no Shukun ni Ubawareru

Noah was raised as a boy since she was born in order to take over as the heir to the Phaistos family. However, she decided to hide the fact that she is actually a woman, left the family for her younger brother's sake, and joined the army. Noah has continued to rack up military achievements in order to become the commander of the federation army, and one day was handpicked to join Prince Johann's bodyguard squad. The prince's bodyguard squad was made up of unique individuals that were the creme of the crop: Noah; her adopted older brother, Kai; the twins Jaden and Benjamin, Dominic, said to be the strongest soldier in the military; and the youngest, Osker. However, Johann often acts like he's not a member of the royal family and is actually a flippant flirt! But as Noah serves Johann, she gradually comes to know how Johann actually feels... (Source: BisouBisou Comics)