On her 16th birthday, Shinigami Momoe mistakenly receives an ancient relic that holds the body of a demon and by opening it, she allowed the demon to take over her. Now, Momoe has the body of a devil but the head of her former teenage self. Momoe’s new body radiates a strong demonic aura that attracts other dangerous demons and she has to protect herself from them. If that wasn’t enough, she has to continue being a teenage girl and go to high school even with her transformation