Peach-Pit

Sakurada Jun spends his days online, ordering whatever he takes a liking to, only to return it before the payment is due. Due to psychological trauma from school, Jun generally keeps contact with people as little as possible. One day he finds instructions online that tell him to put his order into his desk drawer. Rubbing it off as a joke, Jun mindlessly does so only to find that his order instantly disappears from his drawer. A package suddenly appears, containing a beautiful antique doll. (myanimelist.net)

Jun Sakurada, a middle school shut-in refuses to go to school after being traumatized by an embarrassing incident at school. One day, he receives a letter asking "yes or no", and chose "yes", meeting the living doll Shinku and the events of the original Rozen Maiden series unfolding. However, what would have happened if he had chosen "no"? Although he overcame his shut-in nature, this Jun can't find a place where he belongs. (myanimelist.net)