In the original timeline of Rozen Maiden, the shut-in Jun Sakurada chose to wind up the sentient Rozen Maiden doll Shinku and assist her in the Alice Game, a contest among the dolls. However, had Jun decided against winding her up, his life would have taken a very different path. In an alternate universe, Jun has grown up and is attending college, yet he remains gloomy and still carries the scars of his hikikomori past. While working at a bookstore, he discovers a weekly book series titled "How to Make a Girl," which contains a spring for winding a doll. That night, upon returning home, he finds the next volume of the series waiting in his apartment, along with a case for the doll and parts needed to construct the fifth Rozen Maiden, Shinku. But once he has gathered most of the pieces, the books cease to arrive, and he receives a letter announcing that publication has ended. The letter further states that to obtain the remaining doll parts, he must retrieve them from a location known as the N-Field. As if the situation were not strange enough, he begins receiving emails from his younger self, asking for his help in defeating the malicious seventh doll, Kirakishou. Thus, with an incomplete doll, Jun enters the N-Field, unaware of the events that will unfold.