Koyuki, the Necromancing Foxkin

Koyuki is a slave until an incident awakens her powers. With her death magic affinity she has the potential to become a powerful necromancer. In exchange for her freedom she has to attend the Royal Military Academy and serve in the army for 10 years. Follow her journey as she learns about magic, makes new friends and raises all kinds of undead creatures. This story is a mixture of slice of life in an academy setting with some action sprinkled on top. While it is light-hearted it does feature graphic violence, cute undead, a few explosions and a rather powerful main character. There is some romance (yuri) but it is not the focus of the story.