In the ordinary life of Kuroe Akaishi, a reserved high school student, a twist occurs when she encounters the charismatic Arata Minami. Despite his popularity, he extends a hand of friendship towards the isolated Kuroe, causing her heart to flutter in his presence. However, whenever her embarrassment peaks, Kuroe undergoes a startling transformation into a colossal kaijuu, posing a threat to Japan. As the beauty within her clashes with the monstrous form she takes, the country grapples with this enigmatic creature. The crucial question arises: will Minami embrace Kuroe despite her monstrous side, or will he recoil in fear, potentially triggering catastrophic consequences fueled by the intensity of teenage love?