Growing up in the scenic Sasaraijima surrounded by lush mountains and the expansive ocean, Miro Takizawa's formative years were nothing short of picturesque. Despite her introverted disposition, Miro found happiness and excitement during her initial year of high school through her close-knit friendships and romantic pursuits. However, her world was turned upside down when she stumbled upon the unsettling reality of the "Tetsu-min" that ravaged Sasaraijima. Driven by her desire to safeguard her home and its inhabitants from harm, Miro took charge and delved into uncovering the sinister secrets of these malevolent beings.