The story is about a High School student named Lihau Yuexiang/Tachibana who's goal is to be recognized as a manly man. The problem is that he looks exactly like a girl and is constantly bullied by his peers because of this. He is gifted the power to become a gunner princess fighter and hopes to use this newfound strength to prevent the bullying and finally become manly.
(Source: MU)

At the end of Meiji Restoration, a girl saint was crucified and burnt alive under persecution.
A century later, Katori and six childhood friends are summoned to her world beyond the nirvana, where they receive the Great Commission: Build a kingdom, and make disciples of all nations.
At every midnight, each of them are randomly given a role out of King/Queen, Noble, and Peasants. As the lowly must obey a higher-up in the hierarchy, can they fight and defeat other nations to conquer the world--before infighting brought up by their own hidden desires breaks them apart?
(Source: MU)