This is basically the plot...
The plot revolves around Jun Sakurada, a junior high school student who refuses to go back to school after being traumatized by an embarrassing experience. Since then, he avoids leaving his house and spends the day ordering goods online and returning them before the grace period ends. When Jun receives a letter claiming he has won a prize and must follow certain instructions to obtain it, he becomes skeptical, but follows the instructions. Soon after, the letter vanishes and a wood case appears in his room. Inside the box is a very realistic doll which, after being wound, starts moving on its own and introduces herself as Shinku, the fifth doll of the Rozen Maiden series.
I am just practising my singing, how about you?