Jun Sakurada is a Junior High School student who refuses to go to school after being traumatized by an embarrassing experience there (see Hikikomori). He has taken to locking himself in his room, never leaving the house, and spends the day ordering supernatural goods online. His older sister, Nori Sakurada, does everything she can to brighten Jun's dreary existence, but is unable to change his situation. One day, Jun receives a letter claiming he has won a prize. The letter asks whether he will "wind" (まきますか？) or "not wind" (まきませんか？). It states that after he has made his decision, he must place the letter in the drawer of his desk, and a supernatural liaison will take it to the spirit world. Despite his skepticism, he follows these instructions, and discovers soon after that the envelope has vanished. Moments later, he realizes that a richly detailed wood case has materialized within his room. The box contains a strange realistic doll dressed in French aristocratic (synonymous with Gothic Lolita) attire. Jun carefully winds up the doll. The doll creaks, stands up on its own, then proceeds to slap him for handling her as crudely as he had. She introduces herself as, "...Shinku, the fifth doll of the Rozen Maiden." Shinku is a doll from the unique "Rozen Maiden" collection, and before Jun can fully comprehend the weight of his new situation, a stuffed clown plush doll attacks. Shinku promises that she will save Jun's life, but only if he will vow to serve her. Thus, Jun becomes entrusted with the responsibility of protecting Shinku's "Rosa Mystica" whilst she is engaged in a centuries old fight with the other Rozen Maiden dolls for the title of "Alice."