[Angel Spirit Girl]

During world war I, a girl is forced into servanthood with magic by her earth mage evil stepmother when her father dies in battle. It turns out she has fire mage power in her, and gets training from her godmother. Meanwhile, the evil stepmother wants one of her two daughters to marry a local young baron - a royal air force captain who is an air mage. However, he falls in love with the fire mage girl. It's basically a Cinderella retelling.