The Grey Spirited

16 year old Shiro stumbles upon a group of "spirited" that perform unique magic and accidentally gets enrolled. However out of all the classes she had to choose, her eyes led to a "grey" one which studies "necromancy". Shiro with no hesitation, chooses it. But only for everyone around her to look at her with eyes of neglect, as necromancy is considered "impossible".
She persists with this decision as she believes that the Grey class can achieve great things, the great things that can help this shattered society run by a government who aren't all as they seem...