Volume 1: die Zwillinge 
Rozen Maiden die Zwillinge narrates the twin dolls, Suiseiseki and Souseiseki's past story before the manga's starting events. 
 
Volume 2: Rot Schwarz 
Rozen Maiden Rot Schwarz centers on Shinku and Suigintou's past story in the Oxford of the 19th century.

After a traumatic incident, Jun Sakurada refuses to interact with the outside world and return to school—he even shuts out his sister, his closest friend. Jun spends most of his time online buying spiritual items that are obvious rip-offs. One day he finds a website that curiously enough asks him to put his order in his desk drawer. Thinking it's a joke, Jun plays along. The following day a suitcase arrives containing a doll named Shinku... that comes to life before his very eyes! Welcome to the world of Rozen Maiden, where Jun must enter an all-new reality to protect and serve a living doll... 
 
(Source: Tokyopop)

Tags