1Ouverture OVA 1: Eternity
Set in the middle of Träumend, Souseiseki tells Jun the story of the Rozen Maidens' past, when they lived in 19th century, London, and when Shinku first met Suigintou.
2Ouverture OVA 2: Vanity
Suigintou and Shinku become close friends until misunderstandings led to their longtime rivalry.