Suddenly, a person's face turns black, and they die a few days later. Futaba Rinka, who has this special ability, begins living with her cousin Nishimiya Saku after the death of her parents. Since she was a child, Saku has been Rinka's only source of comfort. And her first love. But Saku has a secret that he hasn't told Rinka...? A love suspense story about a girl with special abilities and a mysterious young man!