Manga by author Yuzu

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!

"Siena's refreshing counterattack and fateful love story after a lifetime of being just a sidekick!"After a life filled with misfortune and standing on the sidelines, Siena faces deathonly to discover that her only friend, Daisy, had always seen her as nothing more than a mere sidekick.Realizing she had been manipulated and used throughout her entire life, she is struck by despair. But at that very moment, a miracle happensSiena returns to the past, to the day she was eighteen!