Manga Eiyuu Densetsu Sen No Kiseki

Thors Military Academy is a prestigious school attended by both the nobility and the common people in the war-mongering nation of Erebonia. Rean Schwarzer, a new first-year student, finds out that he and eight other students from wildly different backgrounds have been chosen for the experimental Class VII, a new class in which social hierarchies are not recognized. However, there are a lot of tensions in the Empire, and Rean and his new classmates might soon be involved in conflicts that go far beyond the classroom.