07-Ghost Vol 1

07-Ghost by Yuki Amemiya and Yukino Ichihara. An Action fantasy manga rated Teen.

Teito Klein, a former slave turned top student at a military academy, flees after uncovering memories of a past he can't remember, and finds sanctuary with the bishops of a church that guards a powerful secret. Hunted by the empire, he's drawn into an ancient war between gods and demons. A dark fantasy with striking art.