Tennouji Kotarou is a high school student who lives in Kazamatsuri city. This city became overgrown with flowers and trees due to afforestation and treeplanting. As a result, it conveys a mysterious nostalgia sense. Kotarou has the ability to permanently rewrite his own body by making him faster and stronger at any situation he decided to be. The five girls from his school joins him to scrutinize the supernatural mysteries that appeared.