About The Immortal Girl And Her Contract With The Hundred Demons Manhwa. Kamiya Yuiko, a girl who can see ayakashi and is unable 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.