Kazamatsuri is a fictional metropolis that is abundant with trees and blooms, thanks to the greenery and reforestation efforts. This stands out from other cities where architecture dominates. Although the city has a rural ambiance, it integrates typical urban elements, and although modern, it gives off a nostalgic vibe. Living in Kazamatsuri is Tennouji Kotarou, a high school student who possesses the ability to alter his physical appearance, thus acquiring greater strength and agility effortlessly. Together with five of his classmates, he delves into the investigation of supernatural mysteries.