Dream Knocker: Choco no Kimyou na Bunka Matsuri (Volume)

is the first volume of the Dream Knocker: Choco no Kimyou na Bunka Matsuri light novel series, written by Mikage and Illustrated by Sana Wakatsuki. It was released under the Dengeki Bunko Imprint in September 2006.

Synopsis
Choco, a first-year student in the drama club, has been selected as the protagonist of the play "Toy Box" to be performed at the upcoming school festival, and is busy practicing it. One day, I get a phone call that shouldn't come to the stage during the rehearsal. Chocolate that ends up searching for the criminal as a matter of course. Then, the mystery related to "Toy Box" came out one after another, such as the missing case and mysterious accident five years ago, triggered by this mischievous phone call.

A school mystery full of cute heroines appears on the stage of a school surrounded by a unique atmosphere before the school festival.