Five hazardous "seeds" have been transported to Earth from their vault in the realm of Evergreen. Natsuki, a Queen's agent, has been dispatched to rescue them. However, he is unable to accomplish it alone and seeks the assistance of Chihaya, a middle school kid who is "the only one" who can assist him. She turns into Magical Warrior Carmine with his help in order to save the people possessed by the seeds. However, there are many unanswered questions, such as why Chihaya's mother appears to be aware of this covert activity, why Chihaya recalls her father, who allegedly died before her birth, and why she dreams about Evergreen, which she has never seen.