The Tokiwadai student council election is approaching. Shokuhou Misaki, one of the leading candidates, is in the midst of an election campaign in spite of her own expectations due to the people around her and the fate of being the head of the largest clique...!!

The manga focuses on a certain unnamed character who appears throughout the story of A Certain Scientific Railgun and A Certain Magical Index, and whose name is revealed in this story set at Tokiwadai Middle School.