In the verdant city of Kazamatsuri, where aggressive afforestation has blurred the line between urban and rural, high school student Kotarou Tennouji possesses an extraordinary power: he can permanently rewrite any part of his body to enhance strength, speed, or other physical attributes. Drawn to the paranormal, Kotarou joins the school’s Occult Club, whose members include the cheerful Kotori Kanbe, the stoic Shizuru Nakatsu, the fiery Lucia Konohana, the mysterious Akane Senri, and the energetic Chihaya Ootori. Together, they investigate local legends, urban myths, and supernatural phenomena, each adventure peeling back layers of the girls' personal histories and the city’s hidden secrets.

As the club pursues their quirky investigations—from a nostalgic candy shop facing closure to a legendary sword—Kotarou’s rewriting ability proves both a tool and a burden. The story blends lighthearted school-life comedy with growing undercurrents of mystery and drama. Underneath the everyday adventures, a larger fate looms: a destiny that only Kotarou, with his power to alter reality, might be able to rewrite. The narrative weaves through the common route of the original visual novel, focusing on the bonds forged among the club members and the slowly unraveling truth of the world around them.