Heat and Soul: A Soul Eater Love Story (xKid)

Ember is a half-witch who is taken in by a kind witch during hard times. Little does she know, kindness is not in Iodama's true nature. In return for a place to stay, Ember vows to infiltrate Shibusen to let Iodama take vengeance upon someone. By the time Ember realizes that what she's doing is wrong, it may be too late for her to save her newfound friends...