During the events of Rozen Maiden: Träumend, Jun Sakurada fights and lives alongside the Rozen Maidens, which are unique lifelike dolls designed to battle each other. Jun refuses to accept a brooch as a gift for Shinku, the fifth doll, at any cost. The fourth doll, Souseiseki, then tells the narrative of how Shinku and the first doll, Suigintou, originally met. This story depicts the tragic and heartbreaking circumstances surrounding Suigintou's birth, as well as how the numerous misunderstandings between her and Shinku developed their lengthy rivalry, which was driven by Suigintou's unrelenting hatred for Shinku. As the story progresses, the stage is set in Rozen Maiden: Ouvertüre in 19th century London.