In the year 2030, kaiju attacks have become a daily occurrence. To combat these monstrous threats, Japan has established a specialized defense force known as "Tokuseitai" (Special Biological Defense Squad), stationed across the country. Yet, even Tokuseitai cannot defeat every kaiju—some are simply too powerful. In these desperate moments, humanity turns to its last resort: the "Kaiju Slayer". Unbeknownst to the world, this legendary warrior is none other than Kazuki Ohto, an ordinary high school student who harbors an extraordinary hidden power. When his city is under siege and his loved ones are in danger, Kazuki takes up the mantle of the Kaiju Slayer, secretly wielding his devastating strength against the monstrous invaders. As stronger kaiju continue to emerge, will Kazuki be able to protect his family, his friends, and his secret? The battle for survival begins now!