Dream Knocker: Choco no Kimyou na Bunka Matsuri

is a Japanese light novel series written by Mikage, with illustrations by Sana Wakatsuki. The series began publication on September 10, 2006 by ASCII Media Works under their Dengeki Bunko publishing imprint.

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.