Geiz and Tsukuyomi head towards Amonagawa High School, pursuing a case of young girls mysteriously disappearing from there, as they take Sougo with them! They are confident that Another Rider might be behind the disappearances.
As expected, Another Rider appears at the school. As Sougo transforms to fight off the creature, the students from the school start cheering him on! Unbelievably, this school seems to have a “Kamen Rider Club”…?!