Junketsu no Maria

As a war to determine the rightful ruler of medieval France ravages the land, it seems that the only hope for most, is protection from the heavens above through prayer. But deep in the forest outside of a small, bucolic village, the witch Maria will not stand idly by as men kill each other and commit horrendous acts in the name of God and glory. Using her powerful magic, she'll summon various beasts and demons—even going as far as using a succubus to seduce soldiers into submission under the veil of night—all to stop the needless slaughter. However, Maria's display of her magical might has drawn the ire of the Kingdom of Heaven and after the Archangel Michael puts an end to her meddling, he curses her to lose her powers if she ever gives up her virginity. Will she forgo the forbidden fruit of adulthood in order to bring an end to the merciless machine of war? [Kodansha]