Coffy, Daniel and their teacher Okehazama-sensei wander by accident into the Forbidden Room behind the building of Tumulus High School. When they finally find their way out, they discover they have traveled back in time. Somehow Okehazama-sensei ends up a fallen soldier, and the film promises to reveal the real story behind the famous Battle of Okehazama from Japanese history. The comedy movie was released in 2007.