It was serialized in Square Enix bi-monthly seinen magazine Young Gangan from December 2007 to July 2009.

The central narrative gains momentum as the main characters are drawn into rumors and a concealed secret room.

Growing suspicions encourage the children to question the intentions of the adults around them, suspecting hidden truths.

As the story progresses, they embark on a daring quest to unveil the mystery, facing challenges and risking their lives.

The series is written and illustrated by Kei Sanbe and serialized in Square Enix bi-monthly seinen magazine Young Gangan from December 21, 2007, to July 3, 2009, totalizing 27 chapters.