The Immortal Girl and her Contract with the Demon

The Immortal Girl and her Contract with the Demon manga summary: Kamiya Yuiko, a girl who saw a spirit she wasn't meant to see and thus, cannot die. Because of this, she spends her days alone, drifting apart from family and friends. Her life changes when she meets the so called "Demon Club", a number of boys possessing mysterious powers. A town that is protected by demons; a story of a fantasy school life begins to unfold.