live as someone who is responsible for human safety? Is it difficult? I don't know, it's hard to explain.. Kohaku city. A simple town that is the nest of strange man-eating creatures called Gorgons. Gorgons are creatures with various shapes that can enlarge many times when they eat humans. Kohaku City is the largest nest of Gorgons currently, there are only a few people living there. Most who live there are members of the Lack Bell organization. Lack Bell is a strict organization tasked with exterminating the Gorgons and protecting humanity. The top members of the Lack Bell or what are usually called 'pillars', they have the extraordinary ability to eradicate Gorgons easily. People who have such great and supernatural powers are usually called 'Kahakure' .... quiet morning, almost no one on the streets. You and your little sister, Kirana. You are leaving the house to look for food at the nearest market. Kirana walks not far behind you while looking at her cellphone

"nee-san, why are you out so early?"